SB2012111105 - Stack-based buffer overflow in libproxy

Description

This security bulletin contains information about 1 vulnerability.

1) Stack-based buffer overflow (CVE-ID: CVE-2012-4504)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

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.

Remediation

Install update from vendor's website.

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