1. Ubuntu Security Notices
  2. USN-6611-1

USN-6611-1: Exim vulnerability

Publication date

29 January 2024

Overview

Exim could be made to bypass an SPF protection mechanism if it received a specially crafted request.

Releases

Packages

  • exim4 - Exim is a mail transport agent

Details

It was discovered that Exim incorrectly handled certain requests.
A remote attacker could possibly use a published exploitation technique
to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass
of an SPF protection mechanism.

It was discovered that Exim incorrectly handled certain requests.
A remote attacker could possibly use a published exploitation technique
to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass
of an SPF protection mechanism.

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
23.10 mantic exim4 –  4.96-17ubuntu2.2
exim4-base –  4.96-17ubuntu2.2
eximon4 –  4.96-17ubuntu2.2
22.04 jammy exim4 –  4.95-4ubuntu2.5
exim4-base –  4.95-4ubuntu2.5
eximon4 –  4.95-4ubuntu2.5
20.04 focal exim4 –  4.93-13ubuntu1.10
exim4-base –  4.93-13ubuntu1.10
eximon4 –  4.93-13ubuntu1.10
18.04 bionic exim4 –  4.90.1-1ubuntu1.10+esm3  
exim4-base –  4.90.1-1ubuntu1.10+esm3  
eximon4 –  4.90.1-1ubuntu1.10+esm3  
16.04 xenial exim4 –  4.86.2-2ubuntu2.6+esm6  
exim4-base –  4.86.2-2ubuntu2.6+esm6  
eximon4 –  4.86.2-2ubuntu2.6+esm6  

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References

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