SB2020100526 - Ubuntu update for opendmarc
Published: October 5, 2020 Updated: April 23, 2025
Security Bulletin ID
SB2020100526
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2019-16378)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in OpenDMARC implementation when processing emails with multiple "From:" addresses in a DKIM signed multi-from message. A remote attacker can create a specially crafted email message and bypass signature validation.
Successful exploitation of this vulnerability may allow an attacker to bypass implemented anti-spam measures.
Remediation
Install update from vendor's website.