Bug 1830007 (CVE-2020-12137)

Summary:	CVE-2020-12137 mailman: XSS via file attachments in list archives
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aurelien, jkaluza, pzhukov
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	mailman 2.1.30rc1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:25:12 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:	1830008, 1831147, 1831148
Bug Blocks:	1830009

Description Guilherme de Almeida Suckevicz 2020-04-30 17:26:16 UTC

GNU Mailman 2.x before 2.1.30 uses the .obj extension for scrubbed application/octet-stream MIME parts. This behavior may contribute to XSS attacks against list-archive visitors, because an HTTP reply from an archive web server may lack a MIME type, and a web browser may perform MIME sniffing, conclude that the MIME type should have been text/html, and execute JavaScript code.

References:
https://www.openwall.com/lists/oss-security/2020/02/24/2
https://www.openwall.com/lists/oss-security/2020/02/24/3
https://www.openwall.com/lists/oss-security/2020/04/24/3
http://bazaar.launchpad.net/~mailman-coders/mailman/2.1/view/head:/NEWS

Comment 1 Guilherme de Almeida Suckevicz 2020-04-30 17:26:32 UTC

Created mailman tracking bugs for this issue:

Affects: fedora-all [bug 1830008]

Comment 2 Stefan Cornelius 2020-05-04 17:34:59 UTC

Patch:
https://bazaar.launchpad.net/~mailman-coders/mailman/2.1/revision/1801

Comment 4 Product Security DevOps Team 2020-11-04 02:25:12 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-2020-12137

Comment 5 errata-xmlrpc 2020-11-04 02:48:14 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4667 https://access.redhat.com/errata/RHSA-2020:4667