Stack-based buffer overflow in libproxy - CVE-2012-4504

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the url::get_pac function in url.cpp when processing a large proxy.pac file. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Affected software

How to mitigate CVE-2012-4504

External References

• http://code.google.com/p/libproxy/source/detail?r=853
• http://lists.opensuse.org/opensuse-updates/2012-10/msg00065.html
• http://secunia.com/advisories/51048
• http://www.openwall.com/lists/oss-security/2012/10/12/1
• http://www.openwall.com/lists/oss-security/2012/10/12/5
• http://www.openwall.com/lists/oss-security/2012/10/16/3
• http://www.securityfocus.com/bid/55909
• http://www.ubuntu.com/usn/USN-1629-1
• https://bugzilla.redhat.com/show_bug.cgi?id=864417
• https://exchange.xforce.ibmcloud.com/vulnerabilities/79249
• https://groups.google.com/forum/?fromgroups=#!topic/libproxy/VxZ8No7mT0E

Related Security Bulletins

• Stack-based buffer overflow in libproxy
• Stack-based buffer overflow in libproxy (Alpine package)
• Gentoo update for libproxy