Vulnerabilities 0.9.8

If you think you have found a security bug in OpenSSL, please report it to us.

Show issues fixed only in OpenSSL 3.3, 3.2, 3.1, 3.0, 1.1.1, 1.1.0, 1.0.2, 1.0.1, 1.0.0, 0.9.8, 0.9.7, 0.9.6, or all versions.

OpenSSL 0.9.8 is out of support since 1st January 2016 and no longer receiving updates.

CVE-2016-0704

Severity

Moderate

Published at

1 March 2016

Found by

David Adrian and J.Alex Halderman (University of Michigan)

Affected

from 0.9.8 before 0.9.8zf
from 1.0.0 before 1.0.0r
from 1.0.1 before 1.0.1m
from 1.0.2 before 1.0.2a

References

This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address the vulnerability CVE-2015-0293. s2_srvr.c overwrite the wrong bytes in the master-key when applying Bleichenbacher protection for export cipher suites. This provides a Bleichenbacher oracle, and could potentially allow more efficient variants of the DROWN attack.

CVE-2016-0703

Severity

High

Published at

1 March 2016

Found by

David Adrian and J.Alex Halderman (University of Michigan)

Affected

from 0.9.8 before 0.9.8zf
from 1.0.0 before 1.0.0r
from 1.0.1 before 1.0.1m
from 1.0.2 before 1.0.2a

References

This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. s2_srvr.c did not enforce that clear-key-length is 0 for non-export ciphers. If clear-key bytes are present for these ciphers, they displace encrypted-key bytes. This leads to an efficient divide-and-conquer key recovery attack: if an eavesdropper has intercepted an SSLv2 handshake, they can use the server as an oracle to determine the SSLv2 master-key, using only 16 connections to the server and negligible computation. More importantly, this leads to a more efficient version of DROWN that is effective against non-export ciphersuites, and requires no significant computation.

CVE-2015-3195

Severity

Moderate

Published at

3 December 2015

Found by

Adam Langley (Google/BoringSSL) using libFuzzer

Affected

from 1.0.2 before 1.0.2e
from 1.0.1 before 1.0.1q
from 1.0.0 before 1.0.0t
from 0.9.8 before 0.9.8zh

References

When presented with a malformed X509_ATTRIBUTE structure OpenSSL will leak memory. This structure is used by the PKCS#7 and CMS routines so any application which reads PKCS#7 or CMS data from untrusted sources is affected. SSL/TLS is not affected.

CVE-2015-1792

Severity

Moderate

Published at

11 June 2015

Found by

Johannes Bauer

Affected

from 1.0.2 before 1.0.2b
from 1.0.1 before 1.0.1n
from 1.0.0 before 1.0.0s
from 0.9.8 before 0.9.8zg

References

When verifying a signedData message the CMS code can enter an infinite loop if presented with an unknown hash function OID. This can be used to perform denial of service against any system which verifies signedData messages using the CMS code.

CVE-2015-1791

Severity

Low

Published at

2 June 2015

Found by

Emilia Käsper (OpenSSL)

Affected

from 1.0.2 before 1.0.2b
from 1.0.1 before 1.0.1n
from 1.0.0 before 1.0.0s
from 0.9.8 before 0.9.8zg

References

If a NewSessionTicket is received by a multi-threaded client when attempting to reuse a previous ticket then a race condition can occur potentially leading to a double free of the ticket data.

CVE-2015-1790

Severity

Moderate

Published at

11 June 2015

Found by

Michal Zalewski (Google)

Affected

from 1.0.2 before 1.0.2b
from 1.0.1 before 1.0.1n
from 1.0.0 before 1.0.0s
from 0.9.8 before 0.9.8zg

References

The PKCS#7 parsing code does not handle missing inner EncryptedContent correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with missing content and trigger a NULL pointer dereference on parsing. Applications that decrypt PKCS#7 data or otherwise parse PKCS#7 structures from untrusted sources are affected. OpenSSL clients and servers are not affected.

CVE-2015-1789

Severity

Moderate

Published at

11 June 2015

Found by

Robert Święcki (Google Security Team)

Affected

from 1.0.2 before 1.0.2b
from 1.0.1 before 1.0.1n
from 1.0.0 before 1.0.0s
from 0.9.8 before 0.9.8zg

References

X509_cmp_time does not properly check the length of the ASN1_TIME string and can read a few bytes out of bounds. In addition, X509_cmp_time accepts an arbitrary number of fractional seconds in the time string. An attacker can use this to craft malformed certificates and CRLs of various sizes and potentially cause a segmentation fault, resulting in a DoS on applications that verify certificates or CRLs. TLS clients that verify CRLs are affected. TLS clients and servers with client authentication enabled may be affected if they use custom verification callbacks.

CVE-2015-1788

Severity

Moderate

Published at

11 June 2015

Found by

Joseph Birr-Pixton

Affected

from 1.0.2 before 1.0.2b
from 1.0.1 before 1.0.1n
from 1.0.0 before 1.0.0e
from 0.9.8 before 0.9.8s

References

When processing an ECParameters structure OpenSSL enters an infinite loop if the curve specified is over a specially malformed binary polynomial field. This can be used to perform denial of service against any system which processes public keys, certificate requests or certificates. This includes TLS clients and TLS servers with client authentication enabled.

CVE-2015-0293

Severity

Moderate

Published at

19 March 2015

Found by

Sean Burford (Google) and Emilia Käsper (OpenSSL development team)

Affected

from 1.0.2 before 1.0.2a
from 1.0.1 before 1.0.1m
from 1.0.0 before 1.0.0r
from 0.9.8 before 0.9.8zf

References

DoS via reachable assert in SSLv2 servers. A malicious client can trigger an OPENSSL_assert in servers that both support SSLv2 and enable export cipher suites by sending a specially crafted SSLv2 CLIENT-MASTER-KEY message.

CVE-2015-0292

Severity

Moderate

Published at

19 March 2015

Found by

Robert Dugal, also David Ramos, also Huzaifa Sidhpurwala (Red Hat)

Affected

from 1.0.1 before 1.0.1h
from 1.0.0 before 1.0.0m
from 0.9.8 before 0.9.8za

References

A vulnerability existed in previous versions of OpenSSL related to the processing of base64 encoded data. Any code path that reads base64 data from an untrusted source could be affected (such as the PEM processing routines). Maliciously crafted base 64 data could trigger a segmenation fault or memory corruption.

CVE-2015-0289

Severity

Moderate

Published at

19 March 2015

Found by

Michal Zalewski (Google)

Affected

from 1.0.2 before 1.0.2a
from 1.0.1 before 1.0.1m
from 1.0.0 before 1.0.0r
from 0.9.8 before 0.9.8zf

References

PKCS#7 NULL pointer dereference. The PKCS#7 parsing code does not handle missing outer ContentInfo correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with missing content and trigger a NULL pointer dereference on parsing. Applications that verify PKCS#7 signatures, decrypt PKCS#7 data or otherwise parse PKCS#7 structures from untrusted sources are affected. OpenSSL clients and servers are not affected.

CVE-2015-0288

Severity

Low

Published at

2 March 2015

Found by

Brian Carpenter

Affected

from 1.0.2 before 1.0.2a
from 1.0.1 before 1.0.1m
from 1.0.0 before 1.0.0r
from 0.9.8 before 0.9.8zf

References

X509_to_X509_REQ NULL pointer deref. The function X509_to_X509_REQ will crash with a NULL pointer dereference if the certificate key is invalid. This function is rarely used in practice.

CVE-2015-0287

Severity

Moderate

Published at

19 March 2015

Found by

Emilia Käsper (OpenSSL development team)

Affected

from 1.0.2 before 1.0.2a
from 1.0.1 before 1.0.1m
from 1.0.0 before 1.0.0r
from 0.9.8 before 0.9.8zf

References

ASN.1 structure reuse memory corruption. Reusing a structure in ASN.1 parsing may allow an attacker to cause memory corruption via an invalid write. Such reuse is and has been strongly discouraged and is believed to be rare.

CVE-2015-0286

Severity

Moderate

Published at

19 March 2015

Found by

Stephen Henson (OpenSSL development team)

Affected

from 1.0.2 before 1.0.2a
from 1.0.1 before 1.0.1m
from 1.0.0 before 1.0.0r
from 0.9.8zd before 0.9.8zf

References

Segmentation fault in ASN1_TYPE_cmp. The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check certificate signature algorithm consistency this can be used to crash any certificate verification operation and exploited in a DoS attack. Any application which performs certificate verification is vulnerable including OpenSSL clients and servers which enable client authentication.

CVE-2015-0209

Severity

Low

Published at

19 March 2015

Found by

The BoringSSL project

Affected

from 1.0.2 before 1.0.2a
from 1.0.1 before 1.0.1m
from 1.0.0 before 1.0.0r
from 0.9.8 before 0.9.8zf

References

Use After Free following d2i_ECPrivatekey error. A malformed EC private key file consumed via the d2i_ECPrivateKey function could cause a use after free condition. This, in turn, could cause a double free in several private key parsing functions (such as d2i_PrivateKey or EVP_PKCS82PKEY) and could lead to a DoS attack or memory corruption for applications that receive EC private keys from untrusted sources. This scenario is considered rare.

CVE-2015-0204

Severity

Low

Published at

6 January 2015

Found by

Karthikeyan Bhargavan of the PROSECCO team at INRIA

Affected

from 1.0.1 before 1.0.1k
from 1.0.0 before 1.0.0p
from 0.9.8 before 0.9.8zd

References

An OpenSSL client will accept the use of an RSA temporary key in a non-export RSA key exchange ciphersuite. A server could present a weak temporary key and downgrade the security of the session.

CVE-2014-8275

Severity

Low

Published at

5 January 2015

Found by

Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS program/Konrad Kraszewski from Google

Affected

from 1.0.1 before 1.0.1k
from 1.0.0 before 1.0.0p
from 0.9.8 before 0.9.8zd

References

OpenSSL accepts several non-DER-variations of certificate signature algorithm and signature encodings. OpenSSL also does not enforce a match between the signature algorithm between the signed and unsigned portions of the certificate. By modifying the contents of the signature algorithm or the encoding of the signature, it is possible to change the certificate’s fingerprint. This does not allow an attacker to forge certificates, and does not affect certificate verification or OpenSSL servers/clients in any other way. It also does not affect common revocation mechanisms. Only custom applications that rely on the uniqueness of the fingerprint (e.g. certificate blacklists) may be affected.

CVE-2014-8176

Severity

Moderate

Published at

11 June 2015

Found by

Praveen Kariyanahalli, and subsequently by Ivan Fratric and Felix Groebert (Google)

Affected

from 1.0.1 before 1.0.1h
from 1.0.0 before 1.0.0m
from 0.9.8 before 0.9.8za

References

This vulnerability does not affect current versions of OpenSSL. It existed in previous OpenSSL versions and was fixed in June 2014. If a DTLS peer receives application data between the ChangeCipherSpec and Finished messages, buffering of such data may cause an invalid free, resulting in a segmentation fault or potentially, memory corruption.

CVE-2014-3572

Severity

Low

Published at

5 January 2015

Found by

Karthikeyan Bhargavan of the PROSECCO team at INRIA

Affected

from 1.0.1 before 1.0.1k
from 1.0.0 before 1.0.0p
from 0.9.8 before 0.9.8zd

References

An OpenSSL client will accept a handshake using an ephemeral ECDH ciphersuite using an ECDSA certificate if the server key exchange message is omitted. This effectively removes forward secrecy from the ciphersuite.

CVE-2014-3571

Severity

Moderate

Published at

5 January 2015

Found by

Markus Stenberg of Cisco Systems, Inc

Affected

from 1.0.1 before 1.0.1k
from 1.0.0 before 1.0.0p
from 0.9.8 before 0.9.8zd

References

A carefully crafted DTLS message can cause a segmentation fault in OpenSSL due to a NULL pointer dereference. This could lead to a Denial Of Service attack.

CVE-2014-3570

Severity

Low

Published at

8 January 2015

Found by

Pieter Wuille (Blockstream)

Affected

from 1.0.1 before 1.0.1k
from 1.0.0 before 1.0.0p
from 0.9.8 before 0.9.8zd

References

Bignum squaring (BN_sqr) may produce incorrect results on some platforms, including x86_64. This bug occurs at random with a very low probability, and is not known to be exploitable in any way, though its exact impact is difficult to determine. The following has been determined: *) The probability of BN_sqr producing an incorrect result at random is very low: 1/2^64 on the single affected 32-bit platform (MIPS) and 1/2^128 on affected 64-bit platforms. *) On most platforms, RSA follows a different code path and RSA operations are not affected at all. For the remaining platforms (e.g. OpenSSL built without assembly support), pre-existing countermeasures thwart bug attacks [1]. *) Static ECDH is theoretically affected: it is possible to construct elliptic curve points that would falsely appear to be on the given curve. However, there is no known computationally feasible way to construct such points with low order, and so the security of static ECDH private keys is believed to be unaffected. *) Other routines known to be theoretically affected are modular exponentiation, primality testing, DSA, RSA blinding, JPAKE and SRP. No exploits are known and straightforward bug attacks fail - either the attacker cannot control when the bug triggers, or no private key material is involved.

CVE-2014-3569

Severity

Low

Published at

21 October 2014

Found by

Frank Schmirler

Affected

from 1.0.1j before 1.0.1k
from 1.0.0o before 1.0.0p
from 0.9.8zc before 0.9.8zd

References

When openssl is built with the no-ssl3 option and a SSL v3 ClientHello is received the ssl method would be set to NULL which could later result in a NULL pointer dereference.

CVE-2014-3568

Severity

Low

Published at

15 October 2014

Found by

Akamai Technologies

Affected

from 1.0.1 before 1.0.1j
from 1.0.0 before 1.0.0o
from 0.9.8 before 0.9.8zc

References

When OpenSSL is configured with “no-ssl3” as a build option, servers could accept and complete a SSL 3.0 handshake, and clients could be configured to send them.

CVE-2014-3567

Severity

Moderate

Published at

15 October 2014

Affected

from 1.0.1 before 1.0.1j
from 1.0.0 before 1.0.0o
from 0.9.8g before 0.9.8zc

References

When an OpenSSL SSL/TLS/DTLS server receives a session ticket the integrity of that ticket is first verified. In the event of a session ticket integrity check failing, OpenSSL will fail to free memory causing a memory leak. By sending a large number of invalid session tickets an attacker could exploit this issue in a Denial Of Service attack.

CVE-2014-3510

Published at

6 August 2014

Found by

Felix Gröbert (Google)

Affected

from 1.0.1 before 1.0.1i
from 1.0.0 before 1.0.0n
from 0.9.8 before 0.9.8zb

References

A flaw in handling DTLS anonymous EC(DH) ciphersuites was found. OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject to a denial of service attack. A malicious server can crash the client with a null pointer dereference (read) by specifying an anonymous (EC)DH ciphersuite and sending carefully crafted handshake messages.

CVE-2014-3508

Published at

6 August 2014

Found by

Ivan Fratric (Google)

Affected

from 1.0.1 before 1.0.1i
from 1.0.0 before 1.0.0n
from 0.9.8 before 0.9.8zb

References

A flaw in OBJ_obj2txt may cause pretty printing functions such as X509_name_oneline, X509_name_print_ex, to leak some information from the stack. Applications may be affected if they echo pretty printing output to the attacker. OpenSSL SSL/TLS clients and servers themselves are not affected.

CVE-2014-3507

Published at

6 August 2014

Found by

Adam Langley (Google)

Affected

from 1.0.1 before 1.0.1i
from 1.0.0a before 1.0.0n
from 0.9.8o before 0.9.8zb

References

A DTLS memory leak from zero-length fragments was found. By sending carefully crafted DTLS packets an attacker could cause OpenSSL to leak memory. This could lead to a Denial of Service attack.

CVE-2014-3506

Published at

6 August 2014

Found by

Adam Langley (Google)

Affected

from 1.0.1 before 1.0.1i
from 1.0.0 before 1.0.0n
from 0.9.8 before 0.9.8zb

References

A DTLS flaw leading to memory exhaustion was found. An attacker can force openssl to consume large amounts of memory whilst processing DTLS handshake messages. This could lead to a Denial of Service attack.

CVE-2014-3505

Published at

6 August 2014

Found by

Adam Langley and Wan-Teh Chang (Google)

Affected

from 1.0.1 before 1.0.1i
from 1.0.0 before 1.0.0n
from 0.9.8m before 0.9.8zb

References

A Double Free was found when processing DTLS packets. An attacker can force an error condition which causes openssl to crash whilst processing DTLS packets due to memory being freed twice. This could lead to a Denial of Service attack.

CVE-2014-3470

Published at

30 May 2014

Found by

Felix Gröbert and Ivan Fratrić (Google)

Affected

from 1.0.1 before 1.0.1h
from 1.0.0 before 1.0.0m
from 0.9.8 before 0.9.8za

References

OpenSSL TLS clients enabling anonymous ECDH ciphersuites are subject to a denial of service attack.

CVE-2014-0224

Published at

5 June 2014

Found by

KIKUCHI Masashi (Lepidum Co. Ltd.)

Affected

from 1.0.1 before 1.0.1h
from 1.0.0 before 1.0.0m
from 0.9.8 before 0.9.8za

References

An attacker can force the use of weak keying material in OpenSSL SSL/TLS clients and servers. This can be exploited by a Man-in-the-middle (MITM) attack where the attacker can decrypt and modify traffic from the attacked client and server.

CVE-2014-0221

Published at

5 June 2014

Found by

Imre Rad (Search-Lab Ltd.)

Affected

from 1.0.1 before 1.0.1h
from 1.0.0 before 1.0.0m
from 0.9.8 before 0.9.8za

References

By sending an invalid DTLS handshake to an OpenSSL DTLS client the code can be made to recurse eventually crashing in a DoS attack. Only applications using OpenSSL as a DTLS client are affected.

CVE-2014-0195

Published at

5 June 2014

Found by

Jüri Aedla

Affected

from 1.0.1 before 1.0.1h
from 1.0.0 before 1.0.0m
from 0.9.8o before 0.9.8za

References

A buffer overrun attack can be triggered by sending invalid DTLS fragments to an OpenSSL DTLS client or server. This is potentially exploitable to run arbitrary code on a vulnerable client or server. Only applications using OpenSSL as a DTLS client or server affected.

CVE-2014-0076

Published at

14 February 2014

Found by

Yuval Yarom and Naomi Benger

Affected

from 1.0.1 before 1.0.1g
from 1.0.0 before 1.0.0m
from 0.9.8 before 0.9.8za

References

Fix for the attack described in the paper “Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack”.

CVE-2013-0169

Published at

4 February 2013

Found by

Nadhem J. AlFardan and Kenneth G. Paterson of the Information Security Group Royal Holloway, University of London

Affected

from 1.0.1 before 1.0.1d
from 1.0.0 before 1.0.0k
from 0.9.8 before 0.9.8y

References

A weakness in the handling of CBC ciphersuites in SSL, TLS and DTLS which could lead to plaintext recovery by exploiting timing differences arising during MAC processing.

CVE-2013-0166

Published at

5 February 2013

Found by

Stephen Henson

Affected

from 1.0.1 before 1.0.1d
from 1.0.0 before 1.0.0k
from 0.9.8 before 0.9.8y

References

A flaw in the OpenSSL handling of OCSP response verification can be exploited in a denial of service attack.

CVE-2012-2333

Published at

10 May 2012

Found by

Codenomicon

Affected

from 1.0.1 before 1.0.1c
from 1.0.0 before 1.0.0j
from 0.9.8 before 0.9.8x

References

An integer underflow flaw, leading to a buffer over-read, was found in the way OpenSSL handled TLS 1.1, TLS 1.2, and DTLS (Datagram Transport Layer Security) application data record lengths when using a block cipher in CBC (cipher-block chaining) mode. A malicious TLS 1.1, TLS 1.2, or DTLS client or server could use this flaw to crash its connection peer.

CVE-2012-2131

Published at

24 April 2012

Found by

Red Hat

Affected

from 0.9.8v before 0.9.8w

References

It was discovered that the fix for CVE-2012-2110 released on 19 Apr 2012 was not sufficient to correct the issue for OpenSSL 0.9.8. This issue only affects OpenSSL 0.9.8v. OpenSSL 1.0.1a and 1.0.0i already contain a patch sufficient to correct CVE-2012-2110.

CVE-2012-2110

Published at

19 April 2012

Found by

Tavis Ormandy

Affected

from 1.0.1 before 1.0.1a
from 1.0.0 before 1.0.0i
from 0.9.8 before 0.9.8v

References

Multiple numeric conversion errors, leading to a buffer overflow, were found in the way OpenSSL parsed ASN.1 (Abstract Syntax Notation One) data from BIO (OpenSSL’s I/O abstraction) inputs. Specially-crafted DER (Distinguished Encoding Rules) encoded data read from a file or other BIO input could cause an application using the OpenSSL library to crash or, potentially, execute arbitrary code.

CVE-2012-0884

Published at

12 March 2012

Found by

Ivan Nestlerode

Affected

from 1.0.0 before 1.0.0h
from 0.9.8 before 0.9.8u

References

A weakness in the OpenSSL CMS and PKCS #7 code can be exploited using Bleichenbacher’s attack on PKCS #1 v1.5 RSA padding also known as the million message attack (MMA). Only users of CMS, PKCS #7, or S/MIME decryption operations are affected, SSL/TLS applications are not affected by this issue.

CVE-2012-0050

Published at

4 January 2012

Found by

Antonio Martin

Affected

from 1.0.0f before 1.0.0g
from 0.9.8s before 0.9.8t

References

A flaw in the fix to CVE-2011-4108 can be exploited in a denial of service attack. Only DTLS applications are affected.

CVE-2011-4619

Published at

4 January 2012

Found by

George Kadianakis

Affected

from 1.0.0 before 1.0.0f
from 0.9.8 before 0.9.8s

References

Support for handshake restarts for server gated cryptograpy (SGC) can be used in a denial-of-service attack.

CVE-2011-4577

Published at

4 January 2012

Found by

Andrew Chi

Affected

from 1.0.0 before 1.0.0f
from 0.9.8 before 0.9.8s

References

RFC 3779 data can be included in certificates, and if it is malformed, may trigger an assertion failure. This could be used in a denial-of-service attack. Builds of OpenSSL are only vulnerable if configured with “enable-rfc3779”, which is not a default.

CVE-2011-4576

Published at

4 January 2012

Found by

Adam Langley

Affected

from 1.0.0 before 1.0.0f
from 0.9.8 before 0.9.8s

References

OpenSSL failed to clear the bytes used as block cipher padding in SSL 3.0 records which could leak the contents of memory in some circumstances.

CVE-2011-4109

Published at

4 January 2012

Found by

Ben Laurie

Affected

from 0.9.8 before 0.9.8s

References

If X509_V_FLAG_POLICY_CHECK is set in OpenSSL 0.9.8, then a policy check failure can lead to a double-free. The bug does not occur unless this flag is set. Users of OpenSSL 1.0.0 are not affected.

CVE-2011-4108

Published at

4 January 2012

Found by

Nadhem Alfardan and Kenny Paterson

Affected

from 1.0.0 before 1.0.0f
from 0.9.8 before 0.9.8s

References

OpenSSL was susceptable an extension of the Vaudenay padding oracle attack on CBC mode encryption which enables an efficient plaintext recovery attack against the OpenSSL implementation of DTLS by exploiting timing differences arising during decryption processing.

CVE-2011-0014

Published at

8 February 2011

Found by

Neel Mehta

Affected

from 1.0.0 before 1.0.0d
from 0.9.8h before 0.9.8r

References

A buffer over-read flaw was discovered in the way OpenSSL parsed the Certificate Status Request TLS extensions in ClientHello TLS handshake messages. A remote attacker could possibly use this flaw to crash an SSL server using the affected OpenSSL functionality.

CVE-2010-4180

Published at

2 December 2010

Found by

Martin Rex

Affected

from 1.0.0 before 1.0.0c
from 0.9.8 before 0.9.8q

References

A flaw in the OpenSSL SSL/TLS server code where an old bug workaround allows malicious clients to modify the stored session cache ciphersuite. In some cases the ciphersuite can be downgraded to a weaker one on subsequent connections. This issue only affects OpenSSL based SSL/TLS server if it uses OpenSSL’s internal caching mechanisms and the SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG flag (many applications enable this by using the SSL_OP_ALL option).

CVE-2010-3864

Published at

16 November 2010

Found by

Rob Hulswit

Affected

from 1.0.0 before 1.0.0b
from 0.9.8 before 0.9.8p

References

A flaw in the OpenSSL TLS server extension code parsing which on affected servers can be exploited in a buffer overrun attack. Any OpenSSL based TLS server is vulnerable if it is multi-threaded and uses OpenSSL’s internal caching mechanism. Servers that are multi-process and/or disable internal session caching are NOT affected.

CVE-2010-0742

Published at

1 June 2010

Found by

Ronald Moesbergen

Affected

from 0.9.8h before 0.9.8o
from 1.0.0 before 1.0.0a

References

A flaw in the handling of CMS structures containing OriginatorInfo was found which could lead to a write to invalid memory address or double free. CMS support is disabled by default in OpenSSL 0.9.8 versions.

CVE-2010-0740

Published at

24 March 2010

Found by

Bodo Moeller and Adam Langley (Google)

Affected

from 0.9.8f before 0.9.8n

References

In TLS connections, certain incorrectly formatted records can cause an OpenSSL client or server to crash due to a read attempt at NULL.

CVE-2010-0433

Published at

19 January 2010

Found by

Todd Rinaldo, Tomas Hoger (Red Hat)

Affected

from 0.9.8 before 0.9.8n

References

A missing return value check flaw was discovered in OpenSSL, that could possibly cause OpenSSL to call a Kerberos library function with invalid arguments, resulting in a NULL pointer dereference crash in the MIT Kerberos library. In certain configurations, a remote attacker could use this flaw to crash a TLS/SSL server using OpenSSL by requesting Kerberos cipher suites during the TLS handshake.

CVE-2009-4355

Published at

13 January 2010

Found by

Michael K Johnson and Andy Grimm (rPath)

Affected

from 0.9.8 before 0.9.8m

References

A memory leak in the zlib_stateful_finish function in crypto/comp/c_zlib.c allows remote attackers to cause a denial of service via vectors that trigger incorrect calls to the CRYPTO_cleanup_all_ex_data function.

CVE-2009-3555

Published at

5 November 2009

Affected

from 0.9.8 before 0.9.8m

References

Implement RFC5746 to address vulnerabilities in SSL/TLS renegotiation.

CVE-2009-3245

Published at

23 February 2010

Found by

Martin Olsson, Neel Mehta

Affected

from 0.9.8 before 0.9.8m

References

It was discovered that OpenSSL did not always check the return value of the bn_wexpand() function. An attacker able to trigger a memory allocation failure in that function could cause an application using the OpenSSL library to crash or, possibly, execute arbitrary code.

CVE-2009-1387

Published at

5 February 2009

Found by

Robin Seggelmann

Affected

from 0.9.8 before 0.9.8m

References

Fix denial of service flaw due in the DTLS implementation. A remote attacker could use this flaw to cause a DTLS server to crash.

CVE-2009-1386

Published at

2 June 2009

Found by

Alex Lam

Affected

from 0.9.8 before 0.9.8i

References

Fix a NULL pointer dereference if a DTLS server recieved ChangeCipherSpec as first record. A remote attacker could use this flaw to cause a DTLS server to crash.

CVE-2009-1379

Published at

12 May 2009

Found by

Daniel Mentz, Robin Seggelmann

Affected

from 0.9.8 before 0.9.8m

References

Use-after-free vulnerability in the dtls1_retrieve_buffered_fragment function could cause a client accessing a malicious DTLS server to crash.

CVE-2009-1378

Published at

12 May 2009

Found by

Daniel Mentz, Robin Seggelmann

Affected

from 0.9.8 before 0.9.8m

References

Fix a denial of service flaw in the DTLS implementation. In dtls1_process_out_of_seq_message() the check if the current message is already buffered was missing. For every new message was memory allocated, allowing an attacker to perform an denial of service attack against a DTLS server by sending out of seq handshake messages until there is no memory left.

CVE-2009-1377

Published at

12 May 2009

Found by

Daniel Mentz, Robin Seggelmann

Affected

from 0.9.8 before 0.9.8m

References

Fix a denial of service flaw in the DTLS implementation. Records are buffered if they arrive with a future epoch to be processed after finishing the corresponding handshake. There is currently no limitation to this buffer allowing an attacker to perform a DOS attack to a DTLS server by sending records with future epochs until there is no memory left.

CVE-2009-0789

Published at

25 March 2009

Found by

Paolo Ganci

Affected

from 0.9.8 before 0.9.8k

References

When a malformed ASN1 structure is received it’s contents are freed up and zeroed and an error condition returned. On a small number of platforms where sizeof(long) < sizeof(void *) (for example WIN64) this can cause an invalid memory access later resulting in a crash when some invalid structures are read, for example RSA public keys.

CVE-2009-0591

Published at

25 March 2009

Found by

Ivan Nestlerode, IBM

Affected

from 0.9.8h before 0.9.8k

References

The function CMS_verify() does not correctly handle an error condition involving malformed signed attributes. This will cause an invalid set of signed attributes to appear valid and content digests will not be checked.

CVE-2009-0590

Published at

25 March 2009

Affected

from 0.9.8 before 0.9.8k

References

The function ASN1_STRING_print_ex() when used to print a BMPString or UniversalString will crash with an invalid memory access if the encoded length of the string is illegal. Any OpenSSL application which prints out the contents of a certificate could be affected by this bug, including SSL servers, clients and S/MIME software.

CVE-2008-5077

Published at

7 January 2009

Found by

google

Affected

from 0.9.8 before 0.9.8j

References

The Google Security Team discovered several functions inside OpenSSL incorrectly checked the result after calling the EVP_VerifyFinal function, allowing a malformed signature to be treated as a good signature rather than as an error. This issue affected the signature checks on DSA and ECDSA keys used with SSL/TLS. One way to exploit this flaw would be for a remote attacker who is in control of a malicious server or who can use a ‘man in the middle’ attack to present a malformed SSL/TLS signature from a certificate chain to a vulnerable client, bypassing validation.

CVE-2008-1672

Published at

28 May 2008

Found by

codenomicon

Affected

from 0.9.8f before 0.9.8h

References

Testing using the Codenomicon TLS test suite discovered a flaw if the ‘Server Key exchange message’ is omitted from a TLS handshake in OpenSSL 0.9.8f and OpenSSL 0.9.8g. If a client connects to a malicious server with particular cipher suites, the server could cause the client to crash.

CVE-2008-0891

Published at

28 May 2008

Found by

codenomicon

Affected

from 0.9.8f before 0.9.8h

References

Testing using the Codenomicon TLS test suite discovered a flaw in the handling of server name extension data in OpenSSL 0.9.8f and OpenSSL 0.9.8g. If OpenSSL has been compiled using the non-default TLS server name extensions, a remote attacker could send a carefully crafted packet to a server application using OpenSSL and cause it to crash.

CVE-2007-5135

Published at

12 October 2007

Found by

Moritz Jodeit

Affected

from 0.9.8 before 0.9.8f

References

A flaw was found in the SSL_get_shared_ciphers() utility function. An attacker could send a list of ciphers to an application that used this function and overrun a buffer with a single byte. Few applications make use of this vulnerable function and generally it is used only when applications are compiled for debugging.

CVE-2007-4995

Published at

12 October 2007

Found by

Andy Polyakov

Affected

from 0.9.8 before 0.9.8f

References

A flaw in DTLS support. An attacker could create a malicious client or server that could trigger a heap overflow. This is possibly exploitable to run arbitrary code, but it has not been verified.

CVE-2006-4343

Published at

28 September 2006

Found by

openssl

Affected

from 0.9.7 before 0.9.7l
from 0.9.8 before 0.9.8d

References

A flaw in the SSLv2 client code was discovered. When a client application used OpenSSL to create an SSLv2 connection to a malicious server, that server could cause the client to crash.

CVE-2006-4339

Published at

5 September 2006

Found by

openssl

Affected

from 0.9.7 before 0.9.7k
from 0.9.8 before 0.9.8c

References

Daniel Bleichenbacher discovered an attack on PKCS #1 v1.5 signatures where under certain circumstances it may be possible for an attacker to forge a PKCS #1 v1.5 signature that would be incorrectly verified by OpenSSL.

CVE-2006-3738

Published at

28 September 2006

Found by

openssl

Affected

from 0.9.7 before 0.9.7l
from 0.9.8 before 0.9.8d

References

A buffer overflow was discovered in the SSL_get_shared_ciphers() utility function. An attacker could send a list of ciphers to an application that uses this function and overrun a buffer.

CVE-2006-2940

Published at

28 September 2006

Found by

openssl

Affected

from 0.9.7 before 0.9.7l
from 0.9.8 before 0.9.8d

References

Certain types of public key can take disproportionate amounts of time to process. This could be used by an attacker in a denial of service attack.

CVE-2006-2937

Published at

28 September 2006

Found by

openssl

Affected

from 0.9.7 before 0.9.7l
from 0.9.8 before 0.9.8d

References

During the parsing of certain invalid ASN.1 structures an error condition is mishandled. This can result in an infinite loop which consumes system memory.

CVE-2005-2969

Published at

11 October 2005

Found by

researcher

Affected

from 0.9.7 before 0.9.7h
from 0.9.8 before 0.9.8a

References

A deprecated option, SSL_OP_MISE_SSLV2_RSA_PADDING, could allow an attacker acting as a “man in the middle” to force a connection to downgrade to SSL 2.0 even if both parties support better protocols.

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