The Cryptographic Message Syntax (CMS) implementation in crypto/cms/cms_asn1.c in OpenSSL before 0.9.8o and 1.x before 1.0.0a does not properly handle structures that contain OriginatorInfo, which allows context-dependent attackers to modify invalid memory locations or conduct double-free attacks, and possibly execute arbitrary code, via unspecified vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12395
https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000102.html
https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000101.html
https://kb.bluecoat.com/index?page=content&id=SA50
https://bugzilla.redhat.com/show_bug.cgi?id=598738
http://www.vupen.com/english/advisories/2010/3105
http://www.vupen.com/english/advisories/2010/1313
http://www.securityfocus.com/bid/40502
http://www.openssl.org/news/secadv_20100601.txt
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004564
http://secunia.com/advisories/57353
http://secunia.com/advisories/42733
http://secunia.com/advisories/42724
http://secunia.com/advisories/42457
http://secunia.com/advisories/40024
http://secunia.com/advisories/40000
http://rt.openssl.org/Ticket/Display.html?id=2211&user=guest&pass=guest
http://marc.info/?l=bugtraq&m=129138643405740&w=2
http://cvs.openssl.org/filediff?f=openssl/crypto/cms/cms_asn1.c&v1=1.8&v2=1.8.6.1