CVE-2019-16378

OpenDMARC through 1.3.2 and 1.4.x through 1.4.0-Beta1 is prone to a signature-bypass vulnerability with multiple From: addresses, which might affect applications that consider a domain name to be relevant to the origin of an e-mail message.

Published: 2019-09-17 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-16378 is rated High Risk (65.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.95%). High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-16378

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-13 1.25% 0.95% -0.30%
2 2025-12-28 0.51% 1.25% +0.74%
3 2025-12-27 — 0.51% —

Full EPSS history (25 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-16378

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2019-16378

OS Trackers for CVE-2019-16378

vendor priority summary link
debian not yet assigned CVE-2019-16378 not yet assigned priority: Debian including 1 source packages (opendmarc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-16378
ubuntu medium CVE-2019-16378 medium priority: Ubuntu including 1 source packages (opendmarc), 7 status rows across 7 suites (bionic, disco, eoan, focal, trusty, upstream, xenial): released 3, ignored 2, DNE 1, not-affected 1. https://ubuntu.com/security/CVE-2019-16378

Affected software / configurations for CVE-2019-16378

Vendor Product Version Raw CPE
trusteddomain opendmarc <= 1.3.2 cpe:2.3:a:trusteddomain:opendmarc:*:*:*:*:*:*:*:*
trusteddomain opendmarc 1.4.0 cpe:2.3:a:trusteddomain:opendmarc:1.4.0:beta:*:*:*:*:*:*
trusteddomain opendmarc 1.4.0 cpe:2.3:a:trusteddomain:opendmarc:1.4.0:beta1:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
fedoraproject fedora 29 cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
fedoraproject fedora 30 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
fedoraproject fedora 31 cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

References for CVE-2019-16378

URL Tags
http://www.openwall.com/lists/oss-security/2019/09/17/2 Mailing List
https://bugs.debian.org/940081 Mailing List Third Party Advisory
https://github.com/trusteddomainproject/OpenDMARC/pull/48 Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6HEWDFGRKQHIWKFZH5BNWQDGUPNR7VH3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEUBIHJLMPMB6KHOSGDMUQKSAW4HOCYM/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y7RT6ID7MBCEPNZEIUKK2TZIOCYPJR6E/
https://seclists.org/bugtraq/2019/Sep/36 Mailing List Third Party Advisory
https://usn.ubuntu.com/4567-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4526 Third Party Advisory
https://www.openwall.com/lists/oss-security/2019/09/11/8 Mailing List Third Party Advisory
cvelogic Threat Intelligence