CVE-2008-4977: Improper Link Resolution Before File Access

postfixgroups.pl in Postfix 2.5.2 allows local users to overwrite arbitrary files via a symlink attack on the 1 /tmp/postfixgroups.stdout, 2 /tmp/postfixgroups.stderr, and 3 /tmp/postfixgroups.message temporary files. NOTE: the vendor disputes this vulnerability, stating "This is not a real issue...