GLSA 200507-19: zlib: Buffer overflow

http://security.gentoo.org/

Severity:	high
Title:	zlib: Buffer overflow
Date:	07/22/2005
Bugs:	#99751
ID:	200507-19

Synopsis

zlib is vulnerable to a buffer overflow which could potentially lead to execution of arbitrary code.

Background

zlib is a widely used free and patent unencumbered data compression library.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
sys-libs/zlib	< 1.2.3	>= 1.2.3	All supported architectures

Description

zlib improperly handles invalid data streams which could lead to a buffer overflow.

Impact

By creating a specially crafted compressed data stream, attackers can overwrite data structures for applications that use zlib, resulting in arbitrary code execution or a Denial of Service.

Workaround

There is no known workaround at this time.

Resolution

All zlib users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-libs/zlib-1.2.3"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200507-19.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.