Joined: 25 Feb 2003
Location: Essen, Germany
|Posted: Sun Mar 06, 2005 2:10 pm Post subject: [ GLSA 200503-12 ] Hashcash: Format string vulnerability
|Gentoo Linux Security Advisory
Title: Hashcash: Format string vulnerability (GLSA 200503-12)
Date: March 06, 2005
Updated: May 22, 2006
A format string vulnerability in the Hashcash utility could allow an attacker to execute arbitrary code.
Hashcash is a utility for generating Hashcash tokens, a proof-of-work system to reduce the impact of spam.
Vulnerable: < 1.16-r1
Unaffected: >= 1.16-r1
Architectures: All supported architectures
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.
Successful exploitation would permit an attacker to disrupt Hashcash users, and potentially execute arbitrary code.
There is no known workaround at this time.
All Hashcash users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/hashcash-1.16-r1"
Last edited by GLSA on Mon Sep 22, 2008 4:16 am; edited 8 times in total