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HP-UX Shar Utility Insecure Temporary File Creation Vulnerability
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Secunia Advisory:
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SA10339
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Release Date:
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2003-12-02
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Last Update:
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2004-01-25
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Popularity:
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8,135 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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| OS: | HP-UX 11.x
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Description:
A vulnerability has been identified in HP-UX, which can be exploited by malicious, local users to escalate their privileges.
The vulnerability is caused due to the shar utility creating temporary files with predictable names in the "/tmp" directory. This can be exploited via symlink attacks to e.g. overwrite arbitrary files with another user's privileges.
The vulnerability affects HP9000 servers running HP-UX B.11.00, B.11.04, and B.11.11.
Solution:
Apply following patches available at:
http://itrc.hp.com
HP-UX B.11.11:
PHCO_29010
HP-UX B.11.04:
PHCO_29697
HP-UX B.11.00:
PHCO_28954
Use the "TMPDIR" environment variable to specify a safe temporary directory.
Changelog:
2004-01-25: Added link to CERT vulnerability note.
Original Advisory:
SSRT3630:
http://www4.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX0312-304
Other References:
CERT VU#509454:
http://www.kb.cert.org/vuls/id/509454
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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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