Horde-Chora: Remote code execution

Security Team Contact Address

Updated June 15, 2004

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200406-09 / www-apps/horde-chora
Release Date	June 15, 2004
Latest Revision	December 30, 2007: 02
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-apps/horde-chora	< 1.2.2	>= 1.2.2	All supported architectures

Related bugreports: #53800

Synopsis

A vulnerability in Chora allows remote code execution and file upload.

2. Impact Information

Background

Chora is a PHP-based SVN/CVS repository viewer by the HORDE project.

Description

A vulnerability in the diff viewer of Chora allows an attacker to inject shellcode. An attacker can exploit PHP's file upload functionality to upload a malicious binary to a vulnerable server, chmod it as executable, and run the file.

Impact

An attacker could remotely execute arbitrary binaries with the permissions of the PHP script, conceivably allowing further exploitation of local vulnerabilities and remote root access.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All users are advised to upgrade to the latest version of Chora:

Code Listing 3.1: Resolution

# emerge sync
# emerge -pv ">=www-apps/horde-chora-1.2.2"
# emerge ">=www-apps/horde-chora-1.2.2"

4. References

e-matters Advisory