Sarg: Remote execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200803-21 / sarg
Release Date	March 12, 2008
Latest Revision	March 12, 2008: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-analyzer/sarg	< 2.2.5	>= 2.2.5	All supported architectures

Related bugreports: #212208, #212731

Synopsis

Sarg is vulnerable to the execution of arbitrary code when processed with untrusted input files.

2. Impact Information

Background

Sarg (Squid Analysis Report Generator) is a tool that provides many informations about the Squid web proxy server users activities: time, sites, traffic, etc.

Description

Sarg doesn't properly check its input for abnormal content when processing Squid log files.

Impact

A remote attacker using a vulnerable Squid as a proxy server or a reverse-proxy server can inject arbitrary content into the "User-Agent" HTTP client header, that will be processed by sarg, which will lead to the execution of arbitrary code, or JavaScript injection, allowing Cross-Site Scripting attacks and the theft of credentials.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All sarg users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/sarg-2.2.5"

4. References

Updated March 12, 2008

Summary: This is a Gentoo Linux Security Advisory

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