The GOST ENGINE in OpenSSL before 1.0.0f does not properly handle invalid parameters for the GOST block cipher, which allows remote attackers to cause a denial of service (daemon crash) via crafted data from a TLS client.
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00017.html
http://secunia.com/advisories/57353
http://www.mandriva.com/security/advisories?name=MDVSA-2012:007