Bug 1943276 (CVE-2020-1946) - CVE-2020-1946 spamassassin: Malicious rule configuration files can be configured to run system commands
Summary: CVE-2020-1946 spamassassin: Malicious rule configuration files can be configu...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-1946
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1943277 1943426 1943427 1943428
Blocks: 1943278
TreeView+ depends on / blocked
 
Reported: 2021-03-25 17:21 UTC by Pedro Sampaio
Modified: 2022-05-17 10:01 UTC (History)
5 users (show)

Fixed In Version: spamassassin 3.4.5
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in spamassassin. Malicious rule configuration (.cf) files can be configured to run system commands without any output or errors allowing exploits to be injected in a number of scenarios. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2021-11-09 22:53:03 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:4315 0 None None None 2021-11-09 18:12:16 UTC

Description Pedro Sampaio 2021-03-25 17:21:37 UTC 
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.

References:

https://s.apache.org/3r1wh
Comment 1 Pedro Sampaio 2021-03-25 17:22:00 UTC 
Created spamassassin tracking bugs for this issue:

Affects: fedora-all [bug 1943277]
Comment 2 Doran Moppert 2021-03-26 03:29:11 UTC 
Mitigation:

This vulnerability can only be exploited through a malicious rule configuration file. If you are using third-party rule configuration files, it is important to ensure they come only from trusted sources, or are inspected prior to deployment. Even in the absence of this vulnerability, malicious rule configurations could cause significant disruptions to email processed by SpamAssassin.
Comment 5 errata-xmlrpc 2021-11-09 18:12:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4315 https://access.redhat.com/errata/RHSA-2021:4315
Comment 6 Product Security DevOps Team 2021-11-09 22:53:01 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-1946
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