Critical severity · published Apr 27, 2020
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…
9.8
CVSS
2.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.6% · higher than 85% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
33; 34 · source: NVD
OP
Opendmarc · Trusteddomain
1.3.0 through 1.3.2; 1.4.0 · source: NVD
PY
Pypolicyd-spf · Pypolicyd-spf Project
2.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-20790
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-20790
Exploit
https://bugs.launchpad.net/pypolicyd-spf/+bug/1838816
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2D4JGHMALEJEWWG56DKR5OZB22TK7W5B/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBOGOQOK3TIWWJV66MW5YWNRJAFFYGR5/
Exploit
https://sourceforge.net/p/opendmarc/tickets/235/
Technical Description
https://www.usenix.org/system/files/sec20fall_chen-jianjun_prepub_0.pdf
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