Bug 480592 (CVE-2009-0031) - CVE-2009-0031 kernel: local denial of service in keyctl_join_session_keyring
Summary: CVE-2009-0031 kernel: local denial of service in keyctl_join_session_keyring
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2009-0031
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: Engineering480595 Engineering480596 Engineering480597 Engineering480598 Engineering480599
Blocks:
TreeView+ depends on / blocked
 
Reported: 2009-01-19 11:44 UTC by Mark J. Cox
Modified: 2019-09-29 12:28 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-09-30 21:23:36 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2009:0264 0 normal SHIPPED_LIVE Important: kernel security update 2009-02-10 15:51:56 UTC
Red Hat Product Errata RHSA-2009:0331 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2009-03-12 14:41:10 UTC
Red Hat Product Errata RHSA-2009:0360 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2009-03-27 00:15:06 UTC

Description Mark J. Cox 2009-01-19 11:44:33 UTC 
According to upstream commit 0d54ee1c7850a954026deec4cd4885f331da35cc "security: introduce missing kfree" there is a missing kfree in
keyctl_join_session_keyring.

It looks like a local user could eventually cause a DoS by using up kernel memory, so I assigned this CVE-2009-0031.

http://git2.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0d54ee1c7850a954026deec4cd4885f331da35cc

This should only affect the RHEL4,5,MRG kernels and not RHEL2.1,3 which did not have this code.  I tested this on RHEL5 and kernel memory usage does increase (although it does take some time to DoS a machine and would likely be noticed, I've left the impact as important for now though).

Patch in URL above.
Comment 8 errata-xmlrpc 2009-03-12 14:41:21 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 4

Via RHSA-2009:0331 http://rhn.redhat.com/errata/RHSA-2009:0331.html
Comment 14 errata-xmlrpc 2009-03-27 00:14:56 UTC 
This issue has been addressed in following products:

  MRG for RHEL-5

Via RHSA-2009:0360 https://rhn.redhat.com/errata/RHSA-2009-0360.html
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