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sendmail: X.509 NULL spoofing vulnerability


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201206-30 / sendmail
Release Date June 25, 2012
Latest Revision June 25, 2012: 1
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
mail-mta/sendmail < 8.14.4 >= 8.14.4 All supported architectures

Related bugreports: #299120


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

2.  Impact Information


sendmail is a widely-used Mail Transport Agent (MTA).


A vulnerability has been discovered in sendmail. 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 sendmail.

3.  Resolution Information


There is no known workaround at this time.


All sendmail users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=mail-mta/sendmail-8.14.4"

4.  References


Page updated June 25, 2012

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