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Linux Kernel "listxattr" Memory Corruption and Denial of Service
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Secunia Advisory:
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SA23955
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Release Date:
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2007-01-31
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Last Update:
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2007-09-13
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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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Vendor Patch
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| OS: | Linux Kernel 2.6.x
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| | CVE reference: | CVE-2006-5753 (Secunia mirror)
CVE-2007-3739 (Secunia mirror)
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Description:
Some vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service) or potentially gain escalated privileges.
1) A vulnerability is caused due to an error within the "listxattr" system call when interpreting "bad_inode_ops" return values, which can be exploited to cause a memory corruption.
Successful exploitation requires a bad inode.
2) A vulnerability is caused due to the "acct_stack_growth()" function in mm/mmap.c not correctly separating the stack space from hugetbl pages, which can be exploited to cause a kernel oops.
Successful exploitation may requires a PowerPC system.
Solution:
Update to version 2.6.20 or later.
Provided and/or discovered by:
Reported by the vendor.
Changelog:
2007-02-05: Updated "Solution" section.
2007-09-13: Added vulnerability #2 and a CVE reference.
Original Advisory:
1) http://lkml.org/lkml/2007/1/3/150
2) http://lkml.org/lkml/2007/1/29/180
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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