OpenSSL 0.9.6k allows remote attackers to cause a denial of service (crash via large recursion) via malformed ASN.1 sequences.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5528
http://www.securityfocus.com/bid/8970
http://www.redhat.com/archives/fedora-announce-list/2005-October/msg00087.html
http://www.openssl.org/news/secadv_20031104.txt
http://www.kb.cert.org/vuls/id/412478
http://www.cisco.com/warp/public/707/cisco-sa-20030930-ssl.shtml
http://secunia.com/advisories/17381
http://rhn.redhat.com/errata/RHSA-2004-119.html