Bug 799209 (CVE-2012-1097) - CVE-2012-1097 kernel: regset: Prevent null pointer reference on readonly regsets
Summary: CVE-2012-1097 kernel: regset: Prevent null pointer reference on readonly regsets
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2012-1097
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 799212 799213 799214 799782 818287
Blocks: 799195
TreeView+ depends on / blocked
 
Reported: 2012-03-02 06:42 UTC by Eugene Teo (Security Response)
Modified: 2023-05-11 18:35 UTC (History)
21 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-04-24 13:14:56 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2012:0481 0 normal SHIPPED_LIVE Moderate: kernel security, bug fix, and enhancement update 2012-04-17 22:53:24 UTC
Red Hat Product Errata RHSA-2012:1042 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2012-06-26 22:40:37 UTC

Description Eugene Teo (Security Response) 2012-03-02 06:42:21 UTC 
The regset common infrastructure assumed that regsets would always have .get and .set methods, but not necessarily .active methods.  Unfortunately people have since written regsets without .set methods.  

Rather than putting in stub functions everywhere, handle regsets with null .get or .set methods explicitly.

Acknowledgements:

Red Hat would like to thank H. Peter Anvin for reporting this issue.
Comment 5 Eugene Teo (Security Response) 2012-03-02 07:18:52 UTC 
Statement:

This issue did not affect the Linux kernel as shipped with Red Hat Enterprise Linux 5 as it did not backport upstream commits 4206d3aa and 5bde4d18.
Comment 6 Eugene Teo (Security Response) 2012-03-05 02:06:03 UTC 
Upstream commits:
http://git.kernel.org/linus/c8e252586f8d5de906385d8cf6385fee289a825e
http://git.kernel.org/linus/5189fa19a4b2b4c3bec37c3a019d446148827717
Comment 7 Eugene Teo (Security Response) 2012-03-05 02:10:25 UTC 
Created kernel tracking bugs for this issue

Affects: fedora-all [bug 799782]
Comment 9 Fedora Update System 2012-03-10 21:50:39 UTC 
kernel-3.2.9-2.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 10 Fedora Update System 2012-03-15 02:31:41 UTC 
kernel-2.6.42.9-2.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 12 errata-xmlrpc 2012-04-17 18:57:15 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:0481 https://rhn.redhat.com/errata/RHSA-2012-0481.html
Comment 14 errata-xmlrpc 2012-06-26 18:43:15 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6.1 EUS - Server Only

Via RHSA-2012:1042 https://rhn.redhat.com/errata/RHSA-2012-1042.html
Note You need to log in before you can comment on or make changes to this bug.