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Smb4k Insecure Temporary File Handling Vulnerability
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Secunia Advisory:
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SA16724
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Release Date:
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2005-09-07
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Last Update:
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2005-10-31
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Popularity:
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5,643 views
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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: | Smb4K 0.x
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| CVE reference: | CVE-2005-2851
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Description:
A vulnerability has been reported in Smb4K, which can be exploited by malicious, local users to perform certain actions on a vulnerable system with escalated privileges.
The vulnerability is caused due to the insecure handling of temporary files "/tmp/smb4k.tmp" and "/tmp/sudoers". This can be exploited via symlink attacks to gain full access to the "/etc/super.tab" and "/etc/sudoers" files.
The vulnerability has been reported in all versions of 0.4, 0.5, and 0.6 prior to 0.6.3. The vulnerability reportedly has not been adequately addressed in version 0.6.3.
Solution:
Update to the fixed version or apply patch.
http://smb4k.berlios.de/download.html
Version 0.6.x:
Update to version 0.6.4.
Version 0.5.2:
Apply patch (apply only to an unpatched source).
http://download.berlios.de/smb4k/002_security_fix_smb4k_0.5.2_unified.diff.gz
Version 0.4.1a:
Apply patch (apply only to an unpatched source).
http://download.berlios.de/smb4k/002_security_fix_smb4k_0.4.1a_unified.diff.gz
A potentially symlink issue in lock file handling has also been fixed.
Provided and/or discovered by:
Reported by vendor.
Changelog:
2005-09-27: Added CVE reference.
2005-10-31: Vendor releases improved patches to fully address the vulnerability. Updated "Description" and "Solution" sections.
Original Advisory:
http://smb4k.berlios.de/
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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