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Linux Kernel IA32 Compatibility "execve()" Buffer Overflow
Secunia Advisory: SA15980
Release Date: 2005-07-11
Popularity: 11,575 views

Critical:
Less critical
Impact: Privilege escalation
Where: Local system
Solution Status: Vendor Patch

OS:Linux Kernel 2.4.x
Linux Kernel 2.6.x

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CVE reference:CVE-2005-1768


Description:
Ilja van Sprundel has reported a vulnerability in the Linux kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service) or potentially gain escalated privileges.

The vulnerability is caused due to a race condition in the compatibility code for "execve()" on the IA64 and AMD64 platforms that occurs when counting and copying arguments from user-space to kernel-space.

Successful exploitation crashes the kernel and may allow execution of arbitrary code with escalated privileges.

The vulnerability has been reported in versions 2.4.31 and prior, and in versions 2.6.6 and prior.

Solution:
The vulnerability has been fixed in versions 2.4.32-pre1 and 2.6.7.

Provided and/or discovered by:
Ilja van Sprundel, Suresec.

Original Advisory:
Kernel.org:
http://www.kernel.org/pub/linux/kernel/v2.4/testing/patch-2.4.32.log

Suresec:
http://www.suresec.org/advisories/adv4.pdf


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