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Linux Kernel Multiple Denial of Service Vulnerabilities
Secunia Advisory: SA17786
Release Date: 2005-11-29
Last Update: 2005-12-23
Popularity: 12,691 views

Critical:
Not critical
Impact: DoS
Where: Local system
Solution Status: Vendor Patch

OS:Linux Kernel 2.6.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

Description:
Some vulnerabilities have been reported in the Linux Kernel, which potentially can be exploited by malicious, local users to cause a DoS (Denial of Service).

1) An error in the auto-reap of child processes that have ptrace attached can lead to dangling ptrace references. This may be exploited by local users to cause a kernel crash.

2) The use of "printk()" in the "time_out_leases()" function in "/fs/locks.c" can consume a large amount of kernel log space. This can be exploited by local users to cause a DoS by generating a large number of broken leases.

3) A memory leak error exists in the VFS file lease handling code in "/fs/locks.c". This may be exploited by local users to cause a DoS (memory exhaustion) by performing certain Samba requests that causes an "fasync" entry to be re-allocated by the "fcntl_setlease()" function after the "fasync" queue has already been cleaned by the "locks_delete_lock()" function.

4) An integer overflow error exists in the "invalidate_inode_pages2_range()" function of "/mm/truncate.c". This can be exploited by local users to cause a DoS.

The vulnerabilities have been reported in the 2.6 kernel branch.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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