Bug 1607291 (CVE-2018-4181)

Summary:	CVE-2018-4181 cups: Manipulation of cupsd.conf by a local attacker resulting in limited reads of arbitrary files as root
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bmcclain, dblechte, dfediuck, dmoppert, eedri, jpopelka, mgoldboi, michal.skrivanek, sbonazzo, sherold, twaugh, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-31 22:32:50 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:	1607293, 1607295, 1619490
Bug Blocks:	1607292

Description Andrej Nemec 2018-07-23 08:24:50 UTC

It was found that a local attacker can perform limited reads of arbitrary files as root by manipulating cupsd.conf.

Upstream patch:

https://github.com/apple/cups/commit/d47f6aec436e0e9df6554436e391471097686ecc

Comment 1 Andrej Nemec 2018-07-23 08:31:00 UTC

Created cups tracking bugs for this issue:

Affects: fedora-all [bug 1607293]

Comment 3 Doran Moppert 2018-08-21 03:32:35 UTC

Similar to CVE-2018-4180, this attack vector is only available to users in the cups SystemGroup groups, who can manipulate cupsd.conf using cupsctl.  Impact is further limited when SELinux is enforcing as cupsd operates under a restricted context cupsd_t.

Comment 7 errata-xmlrpc 2020-03-31 19:16:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1050 https://access.redhat.com/errata/RHSA-2020:1050

Comment 8 Product Security DevOps Team 2020-03-31 22:32:50 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-2018-4181