Bug 969518 (CVE-2013-2852)

Summary: CVE-2013-2852 kernel: b43: format string leaking into error msgs
Product: [Other] Security Response Reporter: Petr Matousek <pmatouse>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: agordeev, bhu, dhoward, esammons, fhrbata, iboverma, jkacur, kernel-mgr, lgoncalv, linville, lwang, mcressma, nobody, plougher, rvrbovsk, security-response-team, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=low,public=20130606,reported=20130530,source=distros,cvss2=6/AV:L/AC:H/Au:S/C:C/I:C/A:C,rhel-5/kernel=notaffected,rhel-6/kernel=affected,mrg-2/realtime-kernel=affected,fedora-all/kernel=affected,rhel-7/kernel=notaffected,rhel-6.3.z/kernel=affected
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On: 971387, 971389, 971390, 971391, 971665, 998412    
Bug Blocks: 969516    

Description Petr Matousek 2013-05-31 12:20:43 EDT
The module parameter "fwpostfix" is userspace controllable, unfiltered, and is used to define the firmware filename. b43_do_request_fw() populates ctx->errors[] on error, containing the firmware filename. b43err() parses its arguments as a format string. For systems with b43 hardware, this could lead to a uid-0 to ring-0 escalation.

Acknowledgements:

Red Hat would like to thank Kees Cook for reporting this issue.
Comment 3 Petr Matousek 2013-06-06 07:31:00 EDT
Statement:

This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5.

This issue does affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, and Red Hat Enterprise MRG. Future updates for Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG may address this issue.
Comment 6 Petr Matousek 2013-06-07 02:05:37 EDT
Created kernel tracking bugs for this issue

Affects: fedora-all [bug 971665]
Comment 8 Fedora Update System 2013-06-13 02:05:22 EDT
kernel-3.9.5-201.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 9 Fedora Update System 2013-06-14 00:51:31 EDT
kernel-3.9.5-301.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 10 Fedora Update System 2013-06-30 21:33:28 EDT
kernel-3.9.8-100.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 11 errata-xmlrpc 2013-07-16 13:30:50 EDT
This issue has been addressed in following products:

  OpenStack 3 for RHEL 6

Via RHSA-2013:1080 https://rhn.redhat.com/errata/RHSA-2013-1080.html
Comment 12 errata-xmlrpc 2013-07-16 14:38:11 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2013:1051 https://rhn.redhat.com/errata/RHSA-2013-1051.html
Comment 14 errata-xmlrpc 2013-09-16 13:05:38 EDT
This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2013:1264 https://rhn.redhat.com/errata/RHSA-2013-1264.html
Comment 15 errata-xmlrpc 2013-10-22 13:02:58 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6.3 EUS - Server and Compute Node Only

Via RHSA-2013:1450 https://rhn.redhat.com/errata/RHSA-2013-1450.html