Bug 480592 – CVE-2009-0031 kernel: local denial of service in keyctl_join_session_keyring

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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

Status:	CLOSED ERRATA

Aliases:	CVE-2009-0031

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity high
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	source=git,reported=20090117,public=2...
Keywords:

Depends On:	480595 480596 480597 480598 480599
Blocks:
	Show dependency tree / graph

Reported:	2009-01-19 06:44 EST by Mark J. Cox
Modified:	2018-10-19 21:38 EDT (History)
CC List:	10 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-09-30 17:23:36 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2009:0264	normal	SHIPPED_LIVE	Important: kernel security update	2009-02-10 10:51:56 EST
Red Hat Product Errata	RHSA-2009:0331	normal	SHIPPED_LIVE	Important: kernel security and bug fix update	2009-03-12 10:41:10 EDT
Red Hat Product Errata	RHSA-2009:0360	normal	SHIPPED_LIVE	Important: kernel-rt security and bug fix update	2009-03-26 20:15:06 EDT

Groups: None (edit)

Description Mark J. Cox 2009-01-19 06:44:33 EST

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 10:41:21 EDT

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 2009-03-26 20:14:56 EDT

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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