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Linux Kernel 64bit ABI System Call Parameter Sign Extension Security Issue

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Release Date:  2009-01-14    Last Update:  2012-06-05    Views:  7,771

Secunia Advisory SA33477

Where:

Local system

Impact:

Privilege escalation, DoS

Solution Status:

Vendor Patch

CVE Reference(s):

Description


A security issue has been reported in the Linux Kernel, which can be exploited by malicious, local users to potentially cause a DoS (Denial of Service) or gain escalated privileges.

The security issue is caused due to the kernel accepting certain 32bit parameters passed in a 64bit register from userspace without ensuring that the value is correctly sign extended. This may be exploited to crash a system or potentially gain escalated privileges by passing specially crafted parameters to affected system calls.

Reportedly, the following architectures use a vulnerable ABI system when running a 64bit kernel and a 64bit userspace:
* S390
* PowerPC
* SPARC64
* MIPS
* TILE-Gx


Solution:
Update to version 2.6.27.12 or 2.6.28.1 for the s390 and PowerPC (64bit) architectures, version 2.6.28.6 for the SPARC64 architecture, and version 2.6.29 for the MIPS architecture. Update to version 3.0.33, 3.2.19, or 3.3.8 for the TILE-Gx architecture.

Provided and/or discovered by:
Red Hat credits Christian Borntraeger.

Original Advisory:
Red Hat:
https://bugzilla.redhat.com/show_bug.cgi?id=479969

Kernel.org:
http://www.kernel.org/pub/linux/kernel/v3.0/ChangeLog-3.0.33
http://www.kernel.org/pub/linux/kernel/v3.0/ChangeLog-3.2.19
http://www.kernel.org/pub/linux/kernel/v3.0/ChangeLog-3.3.8

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 64bit ABI System Call Parameter Sign Extension Security Issue

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