Bug 1802977 (CVE-2020-1930)

Summary:	CVE-2020-1930 spamassassin: command injection via crafted configuration file
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jskarvad, kevin, nb
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	spamassassin 3.4.3	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:24:26 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1820648, 1820649
Bug Blocks:	1802979

Description Dhananjay Arunesh 2020-02-14 09:12:30 UTC

A command execution issue was found in Apache SpamAssassin prior to 3.4.3. Carefully crafted nefarious rule configuration (.cf) files can be configured to run system commands similar to CVE-2018-11805. With this bug unpatched, exploits can be injected in a number of scenarios including the same privileges as spamd is run which may be elevated though doing so remotely is difficult. In addition to upgrading to SA 3.4.4, we again recommend that users should only use update channels or 3rd party .cf files from trusted places. If you cannot upgrade, do not use 3rd party rulesets, do not use sa-compile and do not run spamd as an account with elevated privileges.

Reference:
https://seclists.org/bugtraq/2020/Feb/1
https://lists.apache.org/thread.html/r6729f3d3be754a06c39bb4f11c925a3631e8ea2b4c865546d755cb0a@%3Cannounce.apache.org%3E
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B7SY2LUSH2X3IUXN4EQQ5A6QVUFYIV3D/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VOVVKFP2G2AF5GHAB4WMHOEX76A3H6CE/

Comment 1 Stefan Cornelius 2020-04-03 14:14:39 UTC

Statement:

The attack is triggered by malicious specially crafted .cf files which are basically configuration files for spamassasin. These files can be located at:
1. /usr/share/spamassassin
2. /etc/mail/spamassassin
3. user's home directory, in a directory called .spamassassin

All of these locations can only be accessed by either the system administrator or by a user having a local shell account on the machine. In order to successfully exploit this flaw, the attacker needs to convince the user to place the malicious configuration files in one of the above locations.

Comment 5 Product Security DevOps Team 2020-11-04 02:24:26 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-2020-1930

Comment 6 errata-xmlrpc 2020-11-04 02:28:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4625 https://access.redhat.com/errata/RHSA-2020:4625