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.
Solution: The vulnerabilities have been fixed in version 2.6.15-rc3.
Do you have additional information related to this advisory?
Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this
information to firstname.lastname@example.org
Subject: Linux Kernel Multiple Denial of Service Vulnerabilities
No posts yet
You must be logged in to post a comment.
Secunia Customer Login
Not a customer already?
Learn more about how our market leading Vulnerability Management solutions can help you manage risk and ensure compliance.