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Linux Kernel 64bit ABI System Call Parameter Sign Extension Security Issue
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Secunia Advisory:
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SA33477
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Release Date:
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2009-01-14
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Last Update:
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2009-03-06
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Popularity:
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3,536 views
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Critical:
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Less critical
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Impact:
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Privilege escalation
DoS
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Where:
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Local system
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Solution Status:
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Partial Fix
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| OS: | Linux Kernel 2.6.x
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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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
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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