Linux Kernel Key_User_Lookup() Local Parent Deletion Race Vulnerability

BID:13709

Info

Linux Kernel Key_User_Lookup() Local Parent Deletion Race Vulnerability

Bugtraq ID: 13709
Class: Race Condition Error
CVE: CVE-2005-1368
Remote: No
Local: Yes
Published: May 23 2005 12:00AM
Updated: Jul 12 2009 02:56PM
Credit: Alexander Nyberg is credited with the discovery of this issue.
Vulnerable: Redhat Fedora Core3
Linux kernel 2.6.11 .8
Linux kernel 2.6.11 .7
Linux kernel 2.6.11 .6
Linux kernel 2.6.11 .5
Linux kernel 2.6.11 -rc4
Linux kernel 2.6.11 -rc3
Linux kernel 2.6.11 -rc2
Linux kernel 2.6.11
+ Redhat Fedora Core4
 Linux kernel 2.6.10
+ Redhat Fedora Core3
 + Redhat Fedora Core2
 + Trustix Secure Linux 3.0
+ Ubuntu Ubuntu Linux 5.0 4 powerpc
 + Ubuntu Ubuntu Linux 5.0 4 i386
 + Ubuntu Ubuntu Linux 5.0 4 amd64
Not Vulnerable:

Discussion

Linux Kernel Key_User_Lookup() Local Parent Deletion Race Vulnerability

The Linux kernel is susceptible to a local race condition vulnerability in the key_user_lookup() function. This issue only presents itself on SMP capable systems.

This vulnerability allows local attackers to crash the kernel, denying service to legitimate users.

Exploit / POC

Linux Kernel Key_User_Lookup() Local Parent Deletion Race Vulnerability

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

Linux Kernel Key_User_Lookup() Local Parent Deletion Race Vulnerability

Solution:
Ubuntu Linux has released advisory USN-131-1 to address this, and other issues. Please see the referenced advisory for further information.

RedHat Fedora Linux has released advisory FEDORA-2005-392 addressing this issue for Fedora Core 3. Please see the referenced advisory for details on obtaining and applying the appropriate updates.

Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.


Linux kernel 2.6.10

References

Linux Kernel Key_User_Lookup() Local Parent Deletion Race Vulnerability

References:

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