CVE-2019-20790
9.8
CRITICAL · CVSS 3.1 · EPSS 2.6% (pctl 85)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
OpenDMARC through 1.3.2 and 1.4.x, when used with pypolicyd-spf 2.0.2, allows attacks that bypass SPF and DMARC authentication in situations where the HELO field is inconsistent with the MAIL FROM field.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 2.64% — more likely to be exploited than 85% of all CVEs |
| Weakness | CWE-290 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2020-04-27 |
| Last modified | 2026-06-17 |
Affected (3)
| Vendor | Product |
|---|---|
| fedoraproject | fedora |
| pypolicyd-spf project | pypolicyd-spf |
| trusteddomain | opendmarc |
References
- https://bugs.launchpad.net/pypolicyd-spf/+bug/1838816
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2D4JGHMALEJEWWG56DKR5OZB22TK7W5B/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBOGOQOK3TIWWJV66MW5YWNRJAFFYGR5/
- https://sourceforge.net/p/opendmarc/tickets/235/
- https://www.usenix.org/system/files/sec20fall_chen-jianjun_prepub_0.pdf
- https://bugs.launchpad.net/pypolicyd-spf/+bug/1838816
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2D4JGHMALEJEWWG56DKR5OZB22TK7W5B/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBOGOQOK3TIWWJV66MW5YWNRJAFFYGR5/
- https://sourceforge.net/p/opendmarc/tickets/235/
- https://www.usenix.org/system/files/sec20fall_chen-jianjun_prepub_0.pdf
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