1. Ubuntu Security Notices
  2. USN-4567-1

USN-4567-1: OpenDMARC vulnerability

Publication date

5 October 2020

Overview

OpenDMARC could allow signature bypass under certain conditions.

Releases

Packages

  • opendmarc - Open Source implementation of the DMARC specification

Details

It was discovered that OpenDMARC is prone to a signature-bypass vulnerability
with multiple “From:” addresses. An attacker could use it to bypass spam and
abuse filters.

It was discovered that OpenDMARC is prone to a signature-bypass vulnerability
with multiple “From:” addresses. An attacker could use it to bypass spam and
abuse filters.

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
18.04 bionic libopendmarc2 –  1.3.2-3ubuntu0.1
opendmarc –  1.3.2-3ubuntu0.1
rddmarc –  1.3.2-3ubuntu0.1

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References

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