OpenDMARC through 1.3.2 and 1.4.x through 1.4.0-Beta1 has improper null termination in…
Priority MEDIUM 48CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
OpenDMARC through 1.3.2 and 1.4.x through 1.4.0-Beta1 has improper null termination in the function opendmarc_xml_parse that can result in a one-byte heap overflow in opendmarc_xml when parsing a specially crafted DMARC aggregate report. This can cause remote memory corruption when a '\0' byte overwrites the heap metadata of the next chunk and its PREV_INUSE flag.
Why it matters now
EPSS 0.03684 89th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:trusteddomain:opendmarc:*:*:*:*:*:*:*:* | up to 1.3.2 | Vulnerable | Trusteddomain |
| cpe:2.3:a:trusteddomain:opendmarc:1.4.0:beta0:*:*:*:*:*:* | 1.4.0 beta0 | Vulnerable | Trusteddomain |
| cpe:2.3:a:trusteddomain:opendmarc:1.4.0:beta1:*:*:*:*:*:* | 1.4.0 beta1 | Vulnerable | Trusteddomain |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
- cpe:2.3:a:trusteddomain:opendmarc:*:*:*:*:*:*:*:* Versions up to 1.3.2 Vulnerable ·Trusteddomain
- cpe:2.3:a:trusteddomain:opendmarc:1.4.0:beta0:*:*:*:*:*:* Versions 1.4.0 beta0 Vulnerable ·Trusteddomain
- cpe:2.3:a:trusteddomain:opendmarc:1.4.0:beta1:*:*:*:*:*:* Versions 1.4.0 beta1 Vulnerable ·Trusteddomain
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2020-12460
- 2026-10-03 Alias added: GHSA-8c3p-8wh2-8ggf
References
Sources
- CVE-2020-12460 · CVE Program
- CVE-2020-12460 · NVD
- FIRST EPSS
- GHSA-8c3p-8wh2-8ggf · GitHub Advisory Database · CC BY 4.0
- CVE-2020-12460 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences