[ GLSA 200507-19 ] zlib: Buffer overflow

[GLSA]

Gentoo Linux Security Advisory

Title: zlib: Buffer overflow (GLSA 200507-19)
Severity: high
Exploitable: remote
Date: July 22, 2005
Bug(s): #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: sys-libs/zlib
Vulnerable: < 1.2.3
Unaffected: >= 1.2.3
Architectures: 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: