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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.
Vulnerability Assessment Details
Check for the version of the sharutils packages
Detailed Explanation for this Vulnerability Assessment
An updated sharutils package is now available.
This update has been rated as having low security impact by the Red Hat
Security Response Team.
The sharutils package contains a set of tools for encoding and decoding
packages of files in binary or text format.
A stack based overflow bug was found in the way shar handles the -o option.
If a user can be tricked into running a specially crafted command, it could
lead to arbitrary code execution. The Common Vulnerabilities and Exposures
project (cve.mitre.org) has assigned the name CVE-2004-1772 to this issue.
Please note that this issue does not affect Red Hat Enterprise Linux 4.
Two buffer overflow bugs were found in sharutils. If a possible hacker can place
a malicious 'wc' command on a victim's machine, or trick a victim into
running a specially crafted command, it could lead to arbitrary code
execution. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CVE-2004-1773 to this issue.
A bug was found in the way unshar creates temporary files. A local user
could use symlinks to overwrite arbitrary files the victim running unshar
has write access to. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CVE-2005-0990 to this issue.
All users of sharutils should upgrade to this updated package, which
includes backported fixes to correct these issues.
Solution : http://rhn.redhat.com/errata/RHSA-2005-377.html
Network Security Threat Level: High
Networks Security ID:
Vulnerability Assessment Copyright: This script is Copyright (C) 2005 Tenable Network Security
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