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Alerts This Week
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Gentoo: 201206-34 Normal: Msmtp Null Spoofing Vulnerability Report

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Calendar Grey June 25, 2012
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Critical X.509 NULL impersonation flaw found in msmtp exposes Gentoo Linux systems to potential man-in-the-middle risks. Update immediately!
An error in the hostname matching in msmtp might enable remote attackers to conduct man-in-the-middle attacks.

Summary

A vulnerability have been discovered in msmtp. Please review the CVE identifier referenced below for details.

Topics%20covered

Topics Covered

security advisory Gentoo man-in-the-middle normal severity NULL spoofing msmtp hostname matching

Resolution

All msmtp users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=mail-mta/msmtp-1.4.19"

References

[ 1 ] CVE-2009-3942 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3942

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201206-34
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: msmtp: X.509 NULL spoofing vulnerability
Date: June 25, 2012
Bugs: #293647
ID: 201206-34

Topics%20covered

Topics Covered

security advisory Gentoo man-in-the-middle normal severity NULL spoofing msmtp hostname matching

Synopsis

An error in the hostname matching in msmtp might enable remote attackers to conduct man-in-the-middle attacks.

Background

msmtp is an SMTP client and SMTP plugin for mail user agents such as Mutt.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 mail-mta/msmtp < 1.4.19 >= 1.4.19

Impact

===== A remote attacker might employ a specially crafted certificate to conduct man-in-the-middle attacks on SSL connections made using msmtp.

Workaround

There is no known workaround at this time.