High severity7.5NVD Advisory· Published Jun 10, 2021· Updated Jun 17, 2026
CVE-2021-34555
CVE-2021-34555
Description
OpenDMARC 1.4.1 and 1.4.1.1 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a multi-value From header field.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
6cpe:2.3:a:trusteddomain:opendmarc:1.4.1.1:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:trusteddomain:opendmarc:1.4.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:trusteddomain:opendmarc:1.4.1:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- OpenDMARC/OpenDMARCdescription
Patches
Vulnerability mechanics
References
4- github.com/trusteddomainproject/OpenDMARC/pull/178nvdPatchThird Party Advisory
- github.com/trusteddomainproject/OpenDMARC/issues/179nvdExploitIssue TrackingPatchThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2MAT4ZSWPQ5SUTMYCXRXI5SMTWL4AG7E/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZHZD4WZDYRBB2XVW2EQ4DQ2KYMAGPUO/nvd
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