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Linux Kernel Information Disclosure and Denial of Service
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Secunia Advisory:
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SA31366
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Release Date:
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2008-08-06
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Last Update:
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2008-09-12
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Popularity:
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3,983 views
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Critical:
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Not critical
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Impact:
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Exposure of sensitive information
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-2008-3272
CVE-2008-3275
CVE-2008-3534
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Description:
Some vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to disclose potentially sensitive information or to cause a DoS (Denial of Service).
1) An error exists within the "snd_seq_oss_synth_make_info()" function in sound/core/seq/oss/seq_oss_synth.c. This can be exploited to disclose potentially sensitive memory by passing an invalid device number to the vulnerable function.
2) An error exists within the VFS lookup functionality when handling deleted directories. This can be exploited to install a child dentry for a deleted directory and cause a crash on certain filesystems (e.g. UBIFS).
3) An error within the "shmem_delete_inode()" function in mm/shmem.c can be exploited to trigger a kernel BUG via certain file operations.
Vulnerabilities #1 and #2 are reported in versions prior to 2.6.26.2. Vulnerability #3 is reported in versions prior to 2.6.26.1.
Solution:
Update to version 2.6.26.2.
Provided and/or discovered by:
The vendor credits:
1) Tobias Klein
2) Zoltan Sogor
3) Kel Modderman
Changelog:
2008-08-07: Updated "Solution" section.
2008-08-07: Added reporter link to the "Original Advisory" section.
2008-08-12: Added vulnerability #2 to the advisory. Updated credits and the "Original Advisory" section.
2008-09-12: Added vulnerability #3 to the advisory. Updated credits and the "Original Advisory" section and added a CVE reference.
Original Advisory:
Linux Kernel:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.26.2
http://git.kernel.org/?p=linux/kernel...68f7ffec3800425f2391c8c86277606860442
http://git.kernel.org/?p=linux/kernel...b67c8bc72ee23b55381bd6a884f4796692f77
http://git.kernel.org/?p=linux/kernel...cc23fdc78e9d32372553ccf21758a9bd56fa1
Tobias Klein:
http://trapkit.de/advisories/TKADV2008-005.txt
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About this Secunia Advisory
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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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