sendmail: X.509 NULL spoofing vulnerability — GLSA 201206-30

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

Affected Packages

mail-mta/sendmail on all architectures
Affected versions < 8.14.4
Unaffected versions >= 8.14.4

Background

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

Description

A vulnerability has been discovered in sendmail. Please review the CVE identifier referenced below for details.

Impact

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

Workaround

There is no known workaround at this time.

Resolution

All sendmail users should upgrade to the latest version:

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

References

Release Date
June 25, 2012

Latest Revision
June 25, 2012: 1

Severity
normal

Exploitable
remote

Bugzilla entries