1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200503-12 / Hashcash |
| Release Date | March 06, 2005 |
| Latest Revision | May 22, 2006: 02 |
| Impact | normal |
| Exploitable | remote |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| net-misc/hashcash | < 1.16-r1 | >= 1.16-r1 | All supported architectures |
Related bugreports: #83541
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.
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:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/hashcash-1.16-r1" |