SpamAssassin 3.0.4 allows attackers to bypass spam detection via an e-mail with a large number of recipients ("To" addresses), which triggers a bus error in Perl.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11125
https://exchange.xforce.ibmcloud.com/vulnerabilities/23048
http://www.vupen.com/english/advisories/2005/2364
http://www.securityfocus.com/bid/15373
http://www.redhat.com/support/errata/RHSA-2006-0129.html
http://www.novell.com/linux/security/advisories/2005_27_sr.html
http://www.mandriva.com/security/advisories?name=MDKSA-2005:221
http://www.gossamer-threads.com/lists/spamassassin/devel/62649
http://secunia.com/advisories/19158
http://secunia.com/advisories/17877
http://secunia.com/advisories/17666/
http://secunia.com/advisories/17626/
http://secunia.com/advisories/17518/