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Linux Kernel smb Filesystem Implementation Multiple Vulnerabilities
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Secunia Advisory:
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SA13232
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Release Date:
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2004-11-18
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Last Update:
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2005-02-02
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Critical:
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Moderately critical
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Impact:
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Exposure of sensitive information
Privilege escalation
DoS
System access
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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 2.4.x
Linux Kernel 2.6.x
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| | CVE reference: | CVE-2004-0883 (Secunia mirror)
CVE-2004-0949 (Secunia mirror)
CVE-2004-1068 (Secunia mirror)
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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:
Update to version 2.4.28.
Linux Kernel 2.6 branch:
Secunia is not currently aware of a fixed version.
Provided and/or discovered by:
1) Stefan Esser, e-matters.
2) Paul Starzetz, iSEC Security Research.
Changelog:
2004-11-23: Added information about another fixed vulnerability in version 2.4.28.
2004-12-07: Added CVE reference.
2005-02-02: Added link to US-CERT vulnerability note.
Original Advisory:
http://security.e-matters.de/advisories/142004.html
Other References:
US-CERT VU#726198:
http://www.kb.cert.org/vuls/id/726198
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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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