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CVE-2020-1946

Apache SpamAssassin has an OS Command Injection vulnerability

CRITICAL
9.8
CVSS Score
Published: March 25, 2021 at 09:20 AM UTC
Updated: June 17, 2026 at 03:02 AM UTC
3 products affected across 3 vendorsDebian LinuxFedoraSpamassassin

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Severity
CRITICAL9.8
Exploit prediction
EPSS 6%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Spamassassin· Apache
95%
v < 3.4.5Apache SpamAssassin ≤ v < 3.4.5
Affected range stops below 3.4.5, so it looks safe — our inference, not a vendor statement
Debian Linux· Debiandrupal
95%
10.09.0
Fedora· Fedora Projectrpm
95%
323334

References (7)

Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/04/msg00000.html
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7V2SBVTKVLFFT36ECJQ7TQ7KAQCQZDRZ/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JFBFRIG5TX23NF4ND6OAKKY7I6TLRCCP/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKAXYBKBMQOLIW6UKASJCAZRBOIYS4RL/
x_refsource_MISCMailing ListVendor Advisory
Source: [email protected]
https://s.apache.org/3r1wh
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202105-26
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2021/dsa-4879

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-78

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