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Samba "winbind nss info" Privilege Escalation Security Issue
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Secunia Advisory:
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SA26764
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Release Date:
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2007-09-12
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Critical:
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Less critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| Software: | Samba 3.x
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| | CVE reference: | CVE-2007-4138 (Secunia mirror)
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Description:
A security issue has been reported in Samba, which can be exploited by malicious, local users to gain escalated privileges.
The security issue is caused due to Winbind incorrectly assigning a primary group id of 0 to the queried domain user when "winbind nss info" is set to "sfu" or "rfc2307". This can be exploited to gain escalated privileges, but requires that the RFC2307 or SFU (Services for Unix) primary group attributes are missing.
The security issue is reported in Samba versions from 3.0.25 to 3.0.25c.
Solution:
Update to version 3.0.26.
http://www.samba.org/samba/ftp/stable/samba-3.0.26.tar.gz
Apply vendor patch:
http://samba.org/samba/ftp/patches/security/samba-3.0.25-CVE-2007-4138.patch
Provided and/or discovered by:
The vendor credits Rick King.
Original Advisory:
http://samba.org/samba/security/CVE-2007-4138.html
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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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