1. Ubuntu Security Notices
  2. USN-1130-1

USN-1130-1: Exim vulnerability

Publication date

10 May 2011

Overview

Exim could be made to run arbitrary code under some conditions.

Releases

Packages

  • exim4 - Exim mail transfer agent

Details

It was discovered that the Exim daemon did not correctly handle format
strings in DKIM headers. An unauthenticated remote attacker could send
specially crafted email to run arbitrary code as the Exim user. The
default compiler options for affected releases reduces the vulnerability
to a denial of service under most conditions.

It was discovered that the Exim daemon did not correctly handle format
strings in DKIM headers. An unauthenticated remote attacker could send
specially crafted email to run arbitrary code as the Exim user. The
default compiler options for affected releases reduces the vulnerability
to a denial of service under most conditions.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
11.04 natty exim4-daemon-heavy –  4.74-1ubuntu1.1
exim4-daemon-custom –  4.74-1ubuntu1.1
exim4-daemon-light –  4.74-1ubuntu1.1
10.10 maverick exim4-daemon-heavy –  4.72-1ubuntu1.2
exim4-daemon-custom –  4.72-1ubuntu1.2
exim4-daemon-light –  4.72-1ubuntu1.2
10.04 lucid exim4-daemon-heavy –  4.71-3ubuntu1.2
exim4-daemon-custom –  4.71-3ubuntu1.2
exim4-daemon-light –  4.71-3ubuntu1.2

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References

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