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

Remedy

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

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