SB2012071203 - Multiple vulnerabilities in NiH libzip

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2012-1163)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Integer overflow in the _zip_readcdir function in zip_open.c in libzip 0.10 allows remote attackers to execute arbitrary code via the size and offset values for the central directory in a zip archive, which triggers "improper restrictions of operations within the bounds of a memory buffer" and an information leak.

2) Heap-based buffer overflow (CVE-ID: CVE-2012-1162)

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

The vulnerability exists due to a boundary error in Heap-based buffer overflow in the _zip_readcdir function in zip_open.c in libzip 0.10. A remote attacker can use a zip archive with the number of directories set to 0 to trigger heap-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://nih.at/listarchive/libzip-discuss/msg00252.html
• http://www.gentoo.org/security/en/glsa/glsa-201203-23.xml
• http://www.mandriva.com/security/advisories?name=MDVSA-2012:034
• http://www.nih.at/libzip/NEWS.html
• http://www.openwall.com/lists/oss-security/2012/03/21/2
• http://www.openwall.com/lists/oss-security/2012/03/29/11