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Perl "File::Path::rmtree" Directory Permissions Race Condition
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Secunia Advisory:
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SA14531
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Release Date:
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2005-03-09
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Popularity:
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15,060 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: | Perl 5.x
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| CVE reference: | CVE-2005-0448
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Description:
Paul Szabo has reported a vulnerability in Perl "File::Path::rmtree", which potentially can be exploited by malicious, local users to gain escalated privileges.
The vulnerability is caused due to a race condition in the way "File::Path::rmtree" handles directory permissions when cleaning up directories. This can be exploited by replacing an existing sub directory in the directory tree with a symbolic link to an arbitrary file.
Successful exploitation may allow changing permissions of arbitrary files, if root uses an application using the vulnerable code to delete files in a directory having a world-writable sub directory.
This is related to:
SA13643
Solution:
Do not use applications, which use "File::Path::rmtree", on systems with untrusted users.
Provided and/or discovered by:
Paul Szabo
Original Advisory:
http://www.ubuntulinux.org/support/documentation/usn/usn-94-1
Other References:
SA13643:
http://secunia.com/advisories/13643/
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