Heap-based buffer overflow in the px_pac_reload function in lib/pac.c in libproxy 0.2.x and 0.3.x allows remote servers to have an unspecified impact via a crafted Content-Length size in an HTTP response header for a proxy.pac file request, a different vulnerability than CVE-2012-4504.
https://groups.google.com/forum/?fromgroups=#%21topic/libproxy/VxZ8No7mT0E
https://bugzilla.redhat.com/show_bug.cgi?id=864612
http://www.ubuntu.com/usn/USN-1629-1
http://www.securityfocus.com/bid/55910
http://www.openwall.com/lists/oss-security/2012/10/16/3
http://www.openwall.com/lists/oss-security/2012/10/12/5
http://www.openwall.com/lists/oss-security/2012/10/12/1
http://www.debian.org/security/2012/dsa-2571
http://secunia.com/advisories/51308
http://secunia.com/advisories/51180
http://secunia.com/advisories/51048
http://rhn.redhat.com/errata/RHSA-2012-1461.html
http://lists.opensuse.org/opensuse-updates/2012-10/msg00065.html