sendmail: X.509 NULL spoofing vulnerability

1. Gentoo Linux Security Advisory

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

Summary: This is a Gentoo Linux Security Advisory

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