GLSA 200801-11 CherryPy: Directory traversal vulnerability
Posted on: 01/27/2008 06:40 PM

A new security update has been released for Gentoo Linux - CherryPy: Directory traversal vulnerability. Here the announcement:

Gentoo Linux Security Advisory GLSA 200801-11
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http://security.gentoo.org/
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Severity: Normal
Title: CherryPy: Directory traversal vulnerability
Date: January 27, 2008
Bugs: #204829
ID: 200801-11

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Synopsis
========

CherryPy is vulnerable to a directory traversal that could allow
attackers to read and write arbitrary files.

Background
==========

CherryPy is a Python-based, object-oriented web development framework.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-python/cherrypy lt; 3.0.2-r1 *gt;= 2.2.1-r2
gt;= 3.0.2-r1

Description
===========

CherryPy does not sanitize the session id, provided as a cookie value,
in the FileSession._get_file_path() function before using it as part of
the file name.

Impact
======

A remote attacker could exploit this vulnerability to read and possibly
write arbitrary files on the web server, or to hijack valid sessions,
by providing a specially crafted session id. This only affects
applications using file-based sessions.

Workaround
==========

Disable the "FileSession" functionality by using "PostgresqlSession" or
"RamSession" session management in your CherryPy application.

Resolution
==========

All CherryPy 2.2 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=dev-python/cherrypy-2.2.1-r2"

All CherryPy 3.0 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=dev-python/cherrypy-3.0.2-r1"

References
==========

[ 1 ] CVE-2008-0252
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0252

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200801-11.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5



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