Bug 1539127 (CVE-2018-6198)

Summary:	CVE-2018-6198 w3m: insecure temporary files creation when ~/.w3m is unwritable
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NEXTRELEASE	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	eng-i18n-bugs, pnemade, redhat-bugzilla
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	w3m 0.5.3+git20180125	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-06-24 08:48:44 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:	1539128, 1539129, 1539130
Bug Blocks:

Description Pedro Sampaio 2018-01-26 18:16:23 UTC

A flaw was found in w3m 0.5.3-34. When ~/.w3m is unwritable, w3m uses /tmp in an insecure fashion, which allows a local attacker to craft a symlink attack to overwrite arbitrary files.

Upstream patch:

https://github.com/tats/w3m/commit/18dcbadf2771cdb0c18509b14e4e73505b242753

Comment 1 Pedro Sampaio 2018-01-26 18:16:43 UTC

Created w3m tracking bugs for this issue:

Affects: epel-7 [bug 1539130]
Affects: fedora-all [bug 1539129]

Comment 3 Parag Nemade 2018-06-24 08:48:44 UTC

Fixed for all the requested releases.