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msmtp: X.509 NULL spoofing vulnerability


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201206-34 / msmtp
Release Date June 25, 2012
Latest Revision June 25, 2012: 1
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
mail-mta/msmtp < 1.4.19 >= 1.4.19 All supported architectures

Related bugreports: #293647


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

2.  Impact Information


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


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


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

3.  Resolution Information


There is no known workaround at this time.


All msmtp users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=mail-mta/msmtp-1.4.19"

4.  References


Page updated June 25, 2012

Summary: This is a Gentoo Linux Security Advisory

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