Description
A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_sp2_find_mailfrom_domain of the file libopendmarc/opendmarc_spf.c of the component SPF Macro Handler. This manipulation causes improper authentication. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: c48a74c758677fc5272a73eff15ffdbf8afda1a6. Applying a patch is the recommended action to fix this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Trusted Domain Project | OpenDMARC | 1.4.0, 1.4.1, 1.4.2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | opendmarc | No fix yet | — |
| Debian 13 | opendmarc | No fix yet | — |
| Debian 12 | opendmarc | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | opendmarc | No fix yet | — |
| Ubuntu 26.04 LTS | opendmarc | No fix yet | — |
| Ubuntu 24.04 LTS | opendmarc | No fix yet | — |
| Ubuntu 22.04 LTS | opendmarc | No fix yet | — |
| Ubuntu 20.04 LTS | opendmarc | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | opendmarc | No fix yet | — |
| Ubuntu Pro 16.04 LTS | opendmarc | No fix yet | — |
References
- VDB-411038 | Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authentication vdb-entry technical-description
- VDB-411038 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-101281 | CVE Analysis and Report third-party-advisory
- Submit #918284 | The Trusted Domain Project OpenDMARC 1.4.2 Improper Authentication third-party-advisory
- https://github.com/trusteddomainproject/OpenDMARC/issues/262 issue-tracking
- https://github.com/trusteddomainproject/OpenDMARC/pull/328 issue-tracking patch
- https://xuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.html exploit
- https://github.com/trusteddomainproject/OpenDMARC/commit/c48a74c758677fc5272a73eff15ffdbf8afda1a6 patch