[ GLSA 201203-05 ] Rack: Denial of Service

[GLSA]

Gentoo Linux Security Advisory

Title: Rack: Denial of Service (GLSA 201203-05)
Severity: normal
Exploitable: remote
Date: March 06, 2012
Bug(s): #396455
ID: 201203-05

Synopsis

A hash collision vulnerability in Rack allows remote attackers to
cause a Denial of Service condition.


Background

Rack is a modular Ruby web server interface.

Affected Packages

Package: dev-ruby/rack
Vulnerable: < 1.1.3
Unaffected: >= 1.1.3
Architectures: All supported architectures


Description

Rack does not properly randomize hash functions to protect against hash
collision attacks.


Impact

A remote attacker could send a specially crafted form post, possibly
resulting in a Denial of Service condition.


Workaround

There is no known workaround at this time.

Resolution

All Rack users should upgrade to the latest version: