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fbida fbgs Insecure Temporary File Creation Vulnerability
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Secunia Advisory:
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SA19559
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Release Date:
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2006-04-10
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Last Update:
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2006-04-13
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Popularity:
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5,533 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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Unpatched
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| Software: | fbida 2.x
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| CVE reference: | CVE-2006-1695
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Description:
Jan Braun has reported a vulnerability in fbida, which can be exploited by malicious, local users to perform certain actions on a vulnerable system with escalated privileges.
The "fbgs" script creates temporary files insecurely in the "/var/tmp" directory when the "TMPDIR" environment variable isn't defined. This can be exploited to create or overwrite arbitrary files via symlink attacks with the privileges of a user running the vulnerable script.
The vulnerability has been reported in versions 2.01 and 2.03. Other versions may also be affected.
Solution:
Always define a secure directory in the "TMPDIR" environment variable before running the script.
Grant only trusted users access to affected systems.
Provided and/or discovered by:
Jan Braun
Changelog:
2006-04-13: Added CVE reference.
Original Advisory:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=361370
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About this Secunia Advisory
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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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