Trusted Domain Project OpenDMARC up to 1.4.2 DMARC Record Parser opendmarc_util.c opendmarc_util_cleanup off-by-one

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.79+

Summaryinfo

A vulnerability described as critical has been identified in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is the function opendmarc_util_cleanup in the library libopendmarc/opendmarc_util.c of the component DMARC Record Parser. Executing a manipulation can lead to off-by-one. The identification of this vulnerability is CVE-2026-101014. The attack may be launched remotely. Furthermore, there is an exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Trusted Domain Project OpenDMARC up to 1.4.2. It has been declared as critical. This vulnerability affects the function opendmarc_util_cleanup in the library libopendmarc/opendmarc_util.c of the component DMARC Record Parser. The manipulation with an unknown input leads to a off-by-one vulnerability. The CWE definition for the vulnerability is CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-101014. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

It is possible to download the exploit at weitongli.com. It is declared as proof-of-concept.

Applying the patch b3b1da9264bc80324094a27c71e7369bdedc62ae is able to eliminate this problem. The bugfix is ready for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Off-by-one
CWE: CWE-193 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: b3b1da9264bc80324094a27c71e7369bdedc62ae

Timelineinfo

09/27/2026 Advisory disclosed
09/27/2026 +0 days VulDB entry created
09/27/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: 188
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-101014 (🔒)
GCVE (CVE): GCVE-0-2026-101014
GCVE (VulDB): GCVE-100-410884
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/27/2026 13:38
Changes: 09/27/2026 13:38 (62)
Complete: 🔍
Submitter: WeitongLi
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #917100: The Trusted Domain Project OpenDMARC 1.4.2 Out-of-Bounds Read (by WeitongLi)

Once again VulDB remains the best source for vulnerability data.

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