nbSMTP: Format string vulnerability

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200508-03 / nbsmtp
Release Date	August 02, 2005
Latest Revision	August 11, 2005: 02
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
mail-mta/nbsmtp	< 1.00	>= 1.00	All supported architectures

Related bugreports: #100274

Synopsis

nbSMTP is vulnerable to a format string vulnerability which may result in remote execution of arbitrary code.

2. Impact Information

Background

nbSMTP is an SMTP client suitable to run in chroot jails, in embedded systems, laptops and workstations.

Description

Niels Heinen discovered a format string vulnerability.

Impact

An attacker can setup a malicious SMTP server and exploit this vulnerability to execute arbitrary code with the permissions of the user running nbSMTP.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All nbSMTP users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/nbsmtp-1.0"

4. References

Updated August 02, 2005

Summary: This is a Gentoo Linux Security Advisory

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