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Linux Kernel Various Vulnerabilities
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Secunia Advisory:
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SA23361
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Release Date:
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2006-12-14
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Last Update:
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2007-01-10
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Popularity:
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12,577 views
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From local network
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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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Instant alerts on relevant vulnerabilities 
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| | CVE reference: | CVE-2006-5158
CVE-2006-5173
CVE-2006-5648
CVE-2006-5649
CVE-2006-5701
CVE-2006-5871
CVE-2006-5755
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Description:
Some vulnerabilities have been reported within the Linux kernel, which can be exploited by malicious, local users and malicious people to cause a DoS (Denial of Service).
1) An error within the "nlmclnt_mark_reclaim()" function in clntlock.c of the NFS lockd can be exploited by malicious people to cause a DoS by crashing the service.
2) The task switching implementation fails to save and restore EFLAGS of process correctly. This can be exploited by malicious, local users to crash applications and services by invoking a specially crafted executable.
3) An error within the lock handling of the "sys_get_robust_list()" and "sys_set_robust_list()" system calls for the SPARC and PowerPC platforms can be exploited by malicious, local users to e.g. consume all system resources, create unkillable processes, and render a system unrebootable.
4) Problems within the alignment exception handling on SPARC and PowerPC platforms can be exploited by malicious, local users to cause a kernel crash.
5) An error within the implementation of the squashfs file system can be exploited to cause a DoS by mounting a specially crafted squashfs image and performing a read operation on the mounted file system.
6) If UNIX extensions are enabled, certain smbfs mount options are ignored and a client silently mounts shares using the uid, gid and mode options from the server.
Solution:
Restrict access to trusted users only.
Provided and/or discovered by:
1) Matthias Andree
3, 4) Fabio Massimo Di Nitto
5) LMH
6) Bill Allombert
Changelog:
2007-01-10: Added CVE reference.
Original Advisory:
http://www.ubuntu.com/usn/usn-395-1
http://www.us.debian.org/security/2006/dsa-1233
Other References:
http://kernel.org/git/?p=linux/kernel...5c6fa0e204a2b63309c648bb2fde36836c826
http://www.kernel.org/git/?p=linux/ke...b1f5bf9dcdb6f23abf65977a675eb4deba3c0
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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.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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8th Jan, 2009
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