SB2021122006 - Denial of service in OpenDMARC
Published: December 20, 2021
Security Bulletin ID
SB2021122006
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2021-34555)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error when parsing a multi-value From header field. A remote attacker can send a specially crafted message and perform a denial of service attack.
Remediation
Install update from vendor's website.
References
- https://github.com/trusteddomainproject/OpenDMARC/issues/179
- https://github.com/trusteddomainproject/OpenDMARC/pull/178
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VZHZD4WZDYRBB2XVW2EQ4DQ2KYMAGPUO/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2MAT4ZSWPQ5SUTMYCXRXI5SMTWL4AG7E/
- https://github.com/trusteddomainproject/OpenDMARC/releases/tag/rel-opendmarc-1-4-2