Trac: File upload vulnerability

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200506-21 / trac
Release Date	June 22, 2005
Latest Revision	June 22, 2005: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-apps/trac	< 0.8.4	>= 0.8.4	All supported architectures

Related bugreports: #96572

Synopsis

Trac may allow remote attackers to upload files, possibly leading to the execution of arbitrary code.

2. Impact Information

Background

Trac is a minimalistic web-based project management, wiki and bug tracking system including a Subversion interface.

Description

Stefan Esser of the Hardened-PHP project discovered that Trac fails to validate the "id" parameter when uploading attachments to the wiki or the bug tracking system.

Impact

A remote attacker could exploit the vulnerability to upload arbitrary files to a directory where the webserver has write access to, possibly leading to the execution of arbitrary code.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Trac users should upgrade to the latest available version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apps/trac-0.8.4"

4. References

Hardened PHP Advisory 012005

Updated June 22, 2005

Summary: This is a Gentoo Linux Security Advisory

Security Team
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