Vulnerability Assessment & Network Security Forums

If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.

Home >> Browse Vulnerability Assessment Database >> Debian Local Security Checks >> [DSA122] DSA-122-1 zlib

Vulnerability Assessment Details

[DSA122] DSA-122-1 zlib

Vulnerability Assessment Summary
DSA-122-1 zlib

Detailed Explanation for this Vulnerability Assessment

The compression library zlib has a flaw in which it attempts to free
memory more than once under certain conditions. This can possibly be
exploited to run arbitrary code in a program that includes zlib. If a
network application running as root is linked to zlib, this could
potentially lead to a remote root compromise. No exploits are known at
this time. This vulnerability is assigned the CVE candidate name of
The zlib vulnerability is fixed in the Debian zlib package version
1.1.3-5.1. A number of programs either link statically to zlib or include
a private copy of zlib code. These programs must also be upgraded
to eliminate the zlib vulnerability. The affected packages and fixed
versions follow:
Those using the pre-release (testing) version of Debian should upgrade
to zlib 1.1.3-19.1 or a later version. Note that since this version of
Debian has not yet been released it may not be available immediately for
all architectures. Debian 2.2 (potato) is the latest supported release.
We recommend that you upgrade your packages immediately. Note that you
should restart all programs that use the shared zlib library in order
for the fix to take effect. This is most easily done by rebooting the

Solution :
Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: This script is (C) 2005 Michel Arboi

Cables, Connectors


No Discussions have been posted on this vulnerability.