[ GLSA 200503-12 ] Hashcash: Format string vulnerability

[GLSA]

Gentoo Linux Security Advisory

Title: Hashcash: Format string vulnerability (GLSA 200503-12)
Severity: normal
Exploitable: remote
Date: March 06, 2005
Updated: May 22, 2006
Bug(s): #83541
ID: 200503-12

Synopsis

A format string vulnerability in the Hashcash utility could allow an attacker to execute arbitrary code.

Background

Hashcash is a utility for generating Hashcash tokens, a proof-of-work system to reduce the impact of spam.

Affected Packages

Package: net-misc/hashcash
Vulnerable: < 1.16-r1
Unaffected: >= 1.16-r1
Architectures: All supported architectures


Description

Tavis Ormandy of the Gentoo Linux Security Audit Team identified a flaw in the Hashcash utility that an attacker could expose by specifying a malformed reply address.

Impact

Successful exploitation would permit an attacker to disrupt Hashcash users, and potentially execute arbitrary code.

Workaround

There is no known workaround at this time.

Resolution

All Hashcash users should upgrade to the latest version: