CVE-2020-1946
In Apache SpamAssassin before 3.4.5, malicious rule configuration (.cf) files can be configured to run system commands without any output or errors.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In Apache SpamAssassin before 3.4.5, malicious rule configuration (.cf) files can be configured to run system commands without any output or errors. With this, exploits can be injected in a number of scenarios. In addition to upgrading to SA version 3.4.5, users should only use update channels or 3rd party .cf files from trusted places.
- 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
- 6.13% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-78
- Affected
- apache/spamassassin · debian/debian linux · fedoraproject/fedora
- Source
- security@apache.org
EPSS 6.1% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://lists.debian.org/debian-lts-announce/2021/04/msg00000.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7V2SBVTKVLFFT36ECJQ7TQ7KAQCQZDRZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JFBFRIG5TX23NF4ND6OAKKY7I6TLRCCP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKAXYBKBMQOLIW6UKASJCAZRBOIYS4RL/
- https://s.apache.org/3r1whMailing List, Vendor Advisory
- https://security.gentoo.org/glsa/202105-26Third Party Advisory
- https://www.debian.org/security/2021/dsa-4879Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00000.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7V2SBVTKVLFFT36ECJQ7TQ7KAQCQZDRZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JFBFRIG5TX23NF4ND6OAKKY7I6TLRCCP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKAXYBKBMQOLIW6UKASJCAZRBOIYS4RL/
- https://s.apache.org/3r1whMailing List, Vendor Advisory
- https://security.gentoo.org/glsa/202105-26Third Party Advisory
- https://www.debian.org/security/2021/dsa-4879Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.