AMD64 x86 emulation base libraries: Buffer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200507-28 / emul-linux-x86-baselibs
Release Date	July 30, 2005
Latest Revision	August 02, 2005: 02
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-emulation/emul-linux-x86-baselibs	< 2.1.2	>= 2.1.2	AMD64

Related bugreports: #100686

Synopsis

The x86 emulation base libraries for AMD64 contain a vulnerable version of zlib which could potentially lead to execution of arbitrary code.

2. Impact Information

Background

The x86 emulation base libraries for AMD64 emulate the x86 (32-bit) architecture on the AMD64 (64-bit) architecture.

Description

Earlier versions of emul-linux-x86-baselibs contain a vulnerable version of zlib, which may lead to a buffer overflow.

Impact

By creating a specially crafted compressed data stream, attackers can overwrite data structures for applications that use the x86 emulation base libraries for AMD64, resulting in a Denial of Service and potentially arbitrary code execution.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All AMD64 x86 emulation base libraries users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose app-emulation/emul-linux-x86-baselibs

4. References

Updated July 30, 2005

Summary: This is a Gentoo Linux Security Advisory

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