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Linux Kernel ptrace Local Privilege Escalation Vulnerability

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Release Date:  2007-09-24    Last Update:  2007-10-05    Views:  15,597

Secunia Advisory SA26934

Where:

Local system

Impact:

Privilege escalation

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Wojciech Purczynski has reported a vulnerability in the Linux kernel, which can be exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to the kernel not zero-extending x86_64 registers after ptrace in the 32bit entry path in arch/x86_64/ia32/ia32entry.S on x86_64 platforms.

The vulnerability is reported in versions prior to 2.4.35.3 and 2.6.22.7.

Note: A problem in the ATM module, which can cause a kernel panic, has also been reported by Gilles Espinasse.


Solution:
Update to version 2.4.35.3 or 2.6.22.7.

Provided and/or discovered by:
Wojciech Purczynski

Original Advisory:
http://kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.35.3
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.7

iSEC:
http://www.isec.pl/vulnerabilities/isec-0025-syscall-emulation.txt

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 ptrace Local Privilege Escalation Vulnerability

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