** DISPUTED ** postfix_groups.pl in Postfix 2.5.2 allows local users to overwrite arbitrary files via a symlink attack on the (1) /tmp/postfix_groups.stdout, (2) /tmp/postfix_groups.stderr, and (3) /tmp/postfix_groups.message temporary files. NOTE: the vendor disputes this vulnerability, stating "This is not a real issue ... users would have to edit a script under /usr/lib to enable it."

References

• https://nvd.nist.gov/vuln/detail/CVE-2008-4977
• https://bugs.gentoo.org/show_bug.cgi?id=235770
• https://bugs.gentoo.org/show_bug.cgi?id=235811
• http://bugs.debian.org/496401
• http://dev.gentoo.org/~rbu/security/debiantemp/postfix
• http://www.openwall.com/lists/oss-security/2008/10/30/2