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[ GLSA 200503-12 ] Hashcash: Format string vulnerability
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GLSA
Bodhisattva
Bodhisattva


Joined: 25 Feb 2003
Posts: 3829
Location: Essen, Germany

PostPosted: Sun Mar 06, 2005 2:10 pm    Post subject: [ GLSA 200503-12 ] Hashcash: Format string vulnerability Reply with quote

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:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/hashcash-1.16-r1"


References

CVE-2005-0687


Last edited by GLSA on Fri Feb 13, 2015 4:19 am; edited 10 times in total
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