[USN-4567-1] OpenDMARC vulnerability
Paulo Flabiano Smorigo
pfsmorigo at canonical.com
Tue Oct 6 13:44:39 UTC 2020
Ubuntu Security Notice USN-4567-1
October 05, 2020
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
OpenDMARC could allow signature bypass under certain conditions.
- opendmarc: Open Source implementation of the DMARC specification
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
The problem can be corrected by updating your system to the following
Ubuntu 18.04 LTS:
In general, a standard system update will make all the necessary changes.
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