VulnerabilityModified

CVE-2019-20790

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.

CRITICAL 9.8EPSS 2.62%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.62%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 2.62% probability · 85th percentile
CISA KEV: Not listed
Weakness: CWE-290
Affected: trusteddomain/opendmarc · pypolicyd-spf project/pypolicyd-spf · fedoraproject/fedora
Source: cve@mitre.org

References

https://bugs.launchpad.net/pypolicyd-spf/+bug/1838816Exploit, Third Party Advisory
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/Exploit, Third Party Advisory
https://www.usenix.org/system/files/sec20fall_chen-jianjun_prepub_0.pdfTechnical Description, Third Party Advisory
https://bugs.launchpad.net/pypolicyd-spf/+bug/1838816Exploit, Third Party Advisory
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/Exploit, Third Party Advisory
https://www.usenix.org/system/files/sec20fall_chen-jianjun_prepub_0.pdfTechnical Description, Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.