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TITLE:
PhpWiki "UpLoad" PHP Script Upload Vulnerability

SECUNIA ADVISORY ID:
SA24888

VERIFY ADVISORY:
http://secunia.com/advisories/24888/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
PhpWiki 1.x
http://secunia.com/product/5318/

DESCRIPTION:
A vulnerability has been discovered in PhpWiki, which can be
exploited by malicious people to compromise a vulnerable system.

The "UpLoad" wiki page (index.php/UpLoad) fails to properly validate
the extension of an uploaded file. The blacklist of disallowed file
extensions does not include for example ".php3" and ".phtml". This
can be exploited to upload files with such extensions and execute
arbitrary PHP code on the server.

Successful exploitation requires being logged in and that the
webserver is configured to execute PHP scripts with such extensions.
In the default configuration of PhpWiki, no registration or
validation is necessary to log in.

NOTE: The vulnerability is currently being actively exploited.

The vulnerability is confirmed in version 1.3.12p3. Other versions
may also be affected.

SOLUTION:
Disable the UpLoad functionality by giving the file
"lib/plugin/UpLoad.php" the permissions 000 or by moving the file
outside of the web tree.

PROVIDED AND/OR DISCOVERED BY:
Discovered as a 0-day.

ORIGINAL ADVISORY:
PhpWiki:
http://www.nabble.com/Important-UpLoad-security-fix%21-was--Fwd%3A--phpwiki---Open-Discussion--RE%3A-upload-security-risk--t3543463.html

OTHER REFERENCES:
US-CERT VU#914793:
http://www.kb.cert.org/vuls/id/914793

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