CVE-2014-3466

Updated gnutls packages fix security vulnerabilities:

A NULL pointer dereference flaw was discovered in GnuTLS's gnutls_x509_dn_oid_name(). The function, when called with the GNUTLS_X509_DN_OID_RETURN_OID flag, should not return NULL to its caller. However, it could previously return NULL when parsed X.509 certificates included specific OIDs (CVE-2014-3465).

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 (CVE-2014-3466).

These are all security issues fixed in the gnutls-3.4.15-1.1 package on the GA media of openSUSE Tumbleweed.

GnuTLS has been patched to ensure proper parsing of session ids during the TLS/SSL handshake. Additionally, three issues inherited from libtasn1 have been fixed.

Further information is available at http://www.gnutls.org/security.html#GNUTLS-SA-2014-3 http://www.gnutls.org/security.html#GNUTLS-SA-2014-3

These security issues have been fixed:

* Possible memory corruption during connect (CVE-2014-3466)
* Multiple boundary check issues could allow DoS (CVE-2014-3467)
* asn1_get_bit_der() can return negative bit length (CVE-2014-3468)
* Possible DoS by NULL pointer dereference (CVE-2014-3469)

Security Issue references:

* CVE-2014-3466
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3466>

Buffer overflow in the read_server_hello function in lib/gnutls_handshake.c in GnuTLS before 3.1.25, 3.2.x before 3.2.15, and 3.3.x before 3.3.4 allows remote servers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a long session id in a ServerHello message.

Joonas Kuorilehto discovered that GnuTLS incorrectly handled Server Hello messages. A malicious remote server or a machine-in-the-middle could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code.