syslog-ng does not call chdir when it calls chroot, which might allow attackers to escape the intended jail. NOTE: this is only a vulnerability when a separate vulnerability is present. This flaw affects syslog-ng versions prior to and including 2.0.9.
http://www.vupen.com/english/advisories/2010/1796
http://www.openwall.com/lists/oss-security/2008/11/17/3
http://security.gentoo.org/glsa/glsa-200907-10.xml
http://secunia.com/advisories/40551