Buffer overflow in the spa_base64_to_bits function in Exim before 4.43, as originally obtained from Samba code, and as called by the auth_spa_client function, may allow attackers to execute arbitrary code during SPA authentication.
ftp6.us.freebsd.org/pub/mail/exim/ChangeLogs/ChangeLog-4.44
marc.info/?l=bugtraq&m=110824870908614&w=2
security.gentoo.org/glsa/glsa-200501-23.xml
www.exim.org/mail-archives/exim-users/Week-of-Mon-20050103/msg00028.html
www.idefense.com/application/poi/display?id=178&type=vulnerabilities
www.redhat.com/support/errata/RHSA-2005-025.html
www.securityfocus.com/bid/12188
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11293