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AMD64 x86 emulation base libraries: Buffer overflow


1.  Gentoo Linux Security Advisory

Version Information

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


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


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


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


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


There is no known workaround at this time.


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


Page updated July 30, 2005

Summary: This is a Gentoo Linux Security Advisory

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