A "potential buffer overflow in ruleset parsing" for Sendmail 8.12.9, when using the nonstandard rulesets (1) recipient (2), final, or (3) mailer-specific envelope recipients, has unknown consequences.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A595
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3606
https://exchange.xforce.ibmcloud.com/vulnerabilities/13216
http://www.sendmail.org/8.12.10.html
http://www.securityfocus.com/bid/8649
http://www.redhat.com/support/errata/RHSA-2003-283.html
http://www.mandriva.com/security/advisories?name=MDKSA-2003:092
http://www.kb.cert.org/vuls/id/108964
http://www.debian.org/security/2003/dsa-384
http://marc.info/?l=bugtraq&m=106398718909274&w=2
http://marc.info/?l=bugtraq&m=106383437615742&w=2
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000742