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Insecure Library Loading
Moderately critical

Linux Kernel smb Filesystem Implementation Multiple Vulnerabilities

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Release Date:  2004-11-18    Last Update:  2005-02-02    Views:  22,666

Secunia Advisory SA13232

Where:

From local network

Impact:

Exposure of sensitive information, Privilege escalation, DoS, System access

Solution Status:

Partial Fix

CVE Reference(s):

Description


Multiple vulnerabilities have been reported in the Linux Kernel, which potentially can be exploited by malicious, local users to gain escalated privileges or by malicious people to cause a DoS (Denial of Service) or leak kernel memory. Reportedly, it is currently unclear whether some of the vulnerabilities also can be exploited for arbitrary code execution.

1) Stefan Esser has reported multiple vulnerabilities within the smb filesystem (smbfs) implementation that are caused due to various types of errors when handling server responses.

Successful exploitation requires that a malicious person has control over a smb server or is able to intercept and manipulate traffic.

NOTE: Not all of these vulnerabilities affect both the 2.4 and 2.6 kernels (see the original advisory for more information).

2) Paul Starzetz has reported a vulnerability within the "unix_dgram_recvmsg()" function caused due to missing serialization. This can be exploited to increment arbitrary memory locations in kernel space and may allow local users to execute arbitrary code with escalated privileges.

This vulnerability has been reported in version 2.4.27. Prior versions may also be affected.


Solution:
Linux Kernel 2.4 branch:

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Stefan Esser, e-matters.
2) Paul Starzetz, iSEC Security Research.

Original Advisory:
http://security.e-matters.de/advisories/142004.html

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 smb Filesystem Implementation Multiple Vulnerabilities

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