Vulnerability in Pypolicyd-Spf Project
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: +0.001
Affected products
- Pypolicyd-Spf Project — versions 2.0.2
- Trusteddomain Opendmarc — versions 1.4.0
- Fedoraproject Fedora — versions 33, 34
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.usenix.org/system/files/sec20fall_chen-jianjun_prepub_0.pdf (Technical Description, Third Party Advisory)
- sourceforge.net/p/opendmarc/tickets/235/ (Exploit, Third Party Advisory)
- bugs.launchpad.net/pypolicyd-spf/+bug/1838816 (Exploit, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2019-20790?
- CVE-2019-20790 is a critical-severity vulnerability in Pypolicyd-Spf Project, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2020-04-27.
- How severe is CVE-2019-20790?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-20790 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.