Bug 1128767 (CVE-2014-5031)

Summary: CVE-2014-5031 cups: world-readable permissions
Product: [Other] Security Response Reporter: Francisco Alonso <falonso>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bressers, carnil, jpopelka, jrusnack, twaugh
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,public=20140722,reported=20140723,source=oss-security,cvss2=5.0/AV:L/AC:M/Au:S/C:C/I:P/A:N,cwe=CWE-59,rhel-5/cups=wontfix,rhel-6/cups=affected,rhel-7/cups=affected,fedora-all/cups=affected
Fixed In Version: Doc Type: Bug Fix
Doc Text:
It was discovered that CUPS allowed certain users to create symbolic links in certain directories under /var/cache/cups/. A local user with the 'lp' group privileges could use this flaw to read the contents of arbitrary files on the system or, potentially, escalate their privileges on the system.
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-03-26 21:43:17 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On: 1122601, 1128793, 1128794, 1128795    
Bug Blocks: 1101912, 1115577    

Description Francisco Alonso 2014-08-11 14:07:41 UTC
It was reported [1] that CUPS does not check that files have world-readable permissions, which allow to local users to obtain sensitive information.

Upstream patches are available at [2] as well.

[1]: http://seclists.org/oss-sec/2014/q3/209
[2]: https://cups.org/str.php?L4455

Comment 1 Francisco Alonso 2014-08-11 14:42:27 UTC
Statement:

This issue is not planned to be fixed in Red Hat Enterprise Linux 5 as it is now in Production 3 Phase of the support and maintenance life cycle, https://access.redhat.com/support/policy/updates/errata/

Comment 4 Francisco Alonso 2014-08-11 14:46:02 UTC
Created cups tracking bugs for this issue:

Affects: fedora-all [bug 1128795]

Comment 5 Tim Waugh 2014-08-11 16:08:42 UTC
The original upstream fix was in STR #4455.

This caused a regression: 'cupsctl -U root' now fails, as does 'View Error Log' in the web interface.

The regression is STR #4461. I've made a patch for this:
  https://cups.org/str.php?L4461

Comment 7 Martin Prpič 2014-10-07 08:44:45 UTC
IssueDescription:

It was discovered that CUPS allowed certain users to create symbolic links in certain directories under /var/cache/cups/. A local user with the 'lp' group privileges could use this flaw to read the contents of arbitrary files on the system or, potentially, escalate their privileges on the system.

Comment 8 errata-xmlrpc 2014-10-14 07:31:58 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:1388 https://rhn.redhat.com/errata/RHSA-2014-1388.html

Comment 9 Tomas Hoger 2015-03-26 21:43:17 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHBA-2015:0386 https://rhn.redhat.com/errata/RHBA-2015-0386.html