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Linux Kernel Multiple Vulnerabilities

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Release Date:  2006-11-30    Last Update:  2012-08-21    Views:  14,932

Secunia Advisory SA23073

Where:

Local system

Impact:

Exposure of sensitive information, Privilege escalation, DoS

Solution Status:

Vendor Patch

Operating System:

CVE Reference(s):

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), disclose potentially sensitive information, or to potentially gain escalated privileges.

1) An integer overflow error exists within the "get_fdb_entries()" function in net/bridge/br_ioctl.c. This can be exploited to cause a buffer overflow via specially crafted ioctl() requests.

Successful exploitation may allow the execution of arbitrary code with escalated privileges.

2) An error while copying memory from userspace on AMD64 platforms can be exploited to disclose potentially sensitive information.

3) An error in the "generic_file_splice_write()" function can be exploited to potentially gain escalated user or group privileges.

4) An error within the "udp_sendmsg()" function in net/ipv4/udp.c and the "udpv6_sendmsg()" function in net/ipv6/udp.c can be exploited to e.g. cause a crash.

5) A use-after-free error within the "xacct_add_tsk()" function in tsacct.c can be exploited to dereference already freed memory.


Solution:
Update to version 2.6.19.

Provided and/or discovered by:
1) Eugene Teo with further research by a1rsupp1y.
2) Andi Kleen and disclosed as a vulnerability via a Red Hat bug report.
3) Mark Fasheh and reported as a vulnerability by Eugene Teo.
4) cagri coltekin.
5) Oleg Nesterov and reported as a vulnerability by Alexander Peslyak.

Original Advisory:
1) http://projects.info-pull.com/mokb/MOKB-29-11-2006.html
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.18.4
2) https://bugzilla.redhat.com/show_bug.cgi?id=451271
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3022d734a54cbd2b65eea9a024564821101b4a9a
3) https://bugzilla.redhat.com/show_bug.cgi?id=464450
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8c34e2d63231d4bf4852bac8521883944d770fe3
4) http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=1e0c14f49d6b393179f423abbac47f85618d3d46
5) https://bugzilla.redhat.com/show_bug.cgi?id=849722
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=f0ec1aaf54caddd21c259aea8b2ecfbde4ee4fb9

Deep Links:
Links available to Secunia VIM customers

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 vuln@secunia.com

Subject: Linux Kernel Multiple Vulnerabilities

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