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nbSMTP: Format string vulnerability


1.  Gentoo Linux Security Advisory

Version Information

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


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

2.  Impact Information


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


Niels Heinen discovered a format string vulnerability.


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


There is no known workaround at this time.


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


Page updated August 02, 2005

Summary: This is a Gentoo Linux Security Advisory

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