WordPress: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200611-10 / wordpress
Release Date	November 17, 2006
Latest Revision	November 17, 2006: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-apps/wordpress	< 2.0.5	>= 2.0.5	All supported architectures

Related bugreports: #153303

Synopsis

Flaws in WordPress allow a Denial of Service, the disclosure of user metadata and the overwriting of restricted files.

2. Impact Information

Background

WordPress is a PHP and MySQL based multiuser blogging system.

Description

"random" discovered that users can enter serialized objects as strings in their profiles that will be harmful when unserialized. "adapter" found out that user-edit.php fails to effectively deny non-permitted users access to other user's metadata. Additionally, a directory traversal vulnerability in the wp-db-backup module was discovered.

Impact

By entering specially crafted strings in his profile, an attacker can crash PHP or even the web server running WordPress. Additionally, by crafting a simple URL, an attacker can read metadata of any other user, regardless of their own permissions. A user with the permission to use the database backup plugin can possibly overwrite files he otherwise has no access to.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All WordPress users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apps/wordpress-2.0.5"

4. References

Page updated November 17, 2006

Summary: This is a Gentoo Linux Security Advisory

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