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Linux Kernel Ext3 Invalid Inode Number Denial of Service

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Release Date:  2006-08-07    Last Update:  2006-11-17    Views:  16,726

Secunia Advisory SA21369

Where:

From local network

Impact:

DoS

Solution Status:

Vendor Workaround

Operating System:

CVE Reference(s):

Description


James McKenzie has reported a vulnerability in Linux Kernel, which can be exploited by malicious users to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in ext3 when handling an invalid inode number. This can be exploited by sending a specially crafted NFS request with a V2 procedure (e.g. V2_LOOKUP) that specifies an invalid inode number.

Successful exploitation causes the exported directory to be remounted read-only.

The vulnerability has been reported in versions 2.6.14.4, 2.6.17.6, and 2.6.17.7. Other versions may also be affected.


Solution:
A patch is committed to the GIT repository.

Provided and/or discovered by:
James McKenzie

Original Advisory:
http://lkml.org/lkml/2006/7/17/41
http://git.parisc-linux.org/?p=linux-2.6.git;a=commit;h=2ccb48ebb4de139eef4fcefd5f2bb823cb0d81b9

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Linux Kernel Ext3 Invalid Inode Number Denial of Service

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