SpamAssassin 3, Vipul's Razor: Denial of Service vulnerability

Security Team Contact Address

Updated June 21, 2005

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200506-17 / SpamAssassin, Vipul's Razor
Release Date	June 21, 2005
Latest Revision	May 22, 2006: 03
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
mail-filter/spamassassin	< 3.0.4	>= 3.0.4, < 3.0.1	All supported architectures
mail-filter/razor	< 2.74	>= 2.74	All supported architectures

Related bugreports: #94722, #95492, #96776

Synopsis

SpamAssassin and Vipul's Razor are vulnerable to a Denial of Service attack when handling certain malformed messages.

2. Impact Information

Background

SpamAssassin is an extensible email filter which is used to identify junk email. Vipul's Razor is a client for a distributed, collaborative spam detection and filtering network.

Description

SpamAssassin and Vipul's Razor contain a Denial of Service vulnerability when handling special misformatted long message headers.

Impact

By sending a specially crafted message an attacker could cause a Denial of Service attack against the SpamAssassin/Vipul's Razor server.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All SpamAssassin users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-filter/spamassassin-3.0.4"

All Vipul's Razor users should upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-filter/razor-2.74"

4. References