[ GLSA 200801-11 ] CherryPy: Directory traversal vulnerability

[GLSA]

Gentoo Linux Security Advisory

Title: CherryPy: Directory traversal vulnerability (GLSA 200801-11)
Severity: normal
Exploitable: remote
Date: January 27, 2008
Bug(s): #204829
ID: 200801-11

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: dev-python/cherrypy
Vulnerable: < 3.0.2-r1
Unaffected: >= 2.2.1-r2 < 2.2.2
Unaffected: >= 3.0.2-r1
Architectures: All supported architectures


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: