medium
6.8
CWE
119
Advisory Published
CVE Published
Updated

CVE-2014-3466: Buffer Overflow

First published: Wed May 28 2014(Updated: )

A flaw was found in the way GnuTLS parsed session ids from Server Hello packets of the TLS/SSL handshake. A malicious server could use this flaw to send an excessively long session id value and trigger a buffer overflow in a connecting TLS/SSL client using GnuTLS, causing it to crash or, possibly, execute arbitrary code. The flaw is in read_server_hello() / _gnutls_read_server_hello(), where session_id_len is checked to not exceed incoming packet size, but not checked to ensure it does not exceed maximum session id length: <a href="https://www.gitorious.org/gnutls/gnutls/source/8d7d6c6:lib/gnutls_handshake.c#L1747">https://www.gitorious.org/gnutls/gnutls/source/8d7d6c6:lib/gnutls_handshake.c#L1747</a>

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/gnutls<3.1.25
3.1.25
redhat/gnutls<3.2.15
3.2.15
redhat/gnutls<3.3.3
3.3.3
GnuTLS=3.3.0
GnuTLS=3.3.0-pre0
GnuTLS=3.3.1
GnuTLS=3.3.2
GnuTLS=3.3.3
GnuTLS<=3.1.24
GnuTLS=3.1.0
GnuTLS=3.1.1
GnuTLS=3.1.2
GnuTLS=3.1.3
GnuTLS=3.1.4
GnuTLS=3.1.5
GnuTLS=3.1.6
GnuTLS=3.1.7
GnuTLS=3.1.8
GnuTLS=3.1.9
GnuTLS=3.1.10
GnuTLS=3.1.11
GnuTLS=3.1.12
GnuTLS=3.1.13
GnuTLS=3.1.14
GnuTLS=3.1.15
GnuTLS=3.1.16
GnuTLS=3.1.17
GnuTLS=3.1.18
GnuTLS=3.1.19
GnuTLS=3.1.20
GnuTLS=3.1.21
GnuTLS=3.1.22
GnuTLS=3.1.23
GnuTLS=3.2.0
GnuTLS=3.2.1
GnuTLS=3.2.2
GnuTLS=3.2.3
GnuTLS=3.2.4
GnuTLS=3.2.5
GnuTLS=3.2.6
GnuTLS=3.2.7
GnuTLS=3.2.8
GnuTLS=3.2.8.1
GnuTLS=3.2.9
GnuTLS=3.2.10
GnuTLS=3.2.11
GnuTLS=3.2.12
GnuTLS=3.2.12.1
GnuTLS=3.2.13
GnuTLS=3.2.14

Remedy

https://www.gitorious.org/gnutls/gnutls/commit/688ea6428a432c39203d00acd1af0e7684e5ddfd

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2014-3466?

    The severity of CVE-2014-3466 is considered high due to the potential for a buffer overflow that could lead to a crash.

  • How do I fix CVE-2014-3466?

    To fix CVE-2014-3466, upgrade GnuTLS to version 3.1.25 or later, 3.2.15 or later, or 3.3.3 or later.

  • Which versions of GnuTLS are affected by CVE-2014-3466?

    CVE-2014-3466 affects GnuTLS versions prior to 3.1.25, 3.2.15, and 3.3.3.

  • What types of applications are impacted by CVE-2014-3466?

    Applications using vulnerable versions of GnuTLS may be impacted by this vulnerability, especially those utilizing TLS/SSL connections.

  • Is CVE-2014-3466 a remote exploit?

    Yes, CVE-2014-3466 can be exploited remotely by a malicious server during a TLS/SSL handshake.

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