A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_util_cleanup in the library libopendmarc/opendmarc_util.c of the component DMARC Record Parser. Performing a manipulation results in off-by-one.
The attack may be initiated remotely. The exploit is now public and may be used. The patch is named b3b1da9264bc80324094a27c71e7369bdedc62ae.
To fix this issue, it is recommended to deploy a patch.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
References 8
https://github.com/trusteddomainproject/OpenDMARC/commit/b3b1da9264bc80324094a2…
cna@vuldb.com
https://github.com/trusteddomainproject/OpenDMARC/pull/188
cna@vuldb.com
https://github.com/trusteddomainproject/OpenDMARC/pull/344
cna@vuldb.com
https://vuldb.com/cve/CVE-2026-101014
cna@vuldb.com
https://vuldb.com/submit/917100
cna@vuldb.com
https://vuldb.com/vuln/410884
cna@vuldb.com
https://vuldb.com/vuln/410884/cti
cna@vuldb.com
https://weitongli.com/share/opendmarc-cleanup-off-by-one.html
cna@vuldb.com