Linux Kernel ULE Packet Handling Denial of Service
Secunia Advisory: SA21820
Release Date: 2006-09-11
Last Update: 2007-09-24
Popularity: 10,088 views

Critical:
Less critical
Impact: DoS
Where: From remote
Solution Status: Vendor Patch

OS:Linux Kernel 2.6.x

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CVE reference:CVE-2006-4623


Description:
Ang Way Chuang has reported a vulnerability in the Linux Kernel, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the ULE (Unidirectional Lightweight Encapsulation) decapsulation code when processing ULE packets. This can be exploited to crash the system by sending a malicious ULE packet with an SNDU (Sub Network Data Unit) size of 0.

The vulnerability is reported in version 2.6.17.11. Other versions may also be affected.

Solution:
Update to version 2.6.16.30 or later for the 2.6.16.x branch or 2.6.17.14 or later for the 2.6.17.x branch.

Provided and/or discovered by:
Ang Way Chuang

Changelog:
2007-09-24: Updated "Solution" section.

Original Advisory:
http://lkml.org/lkml/2006/8/20/278


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