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TITLE:
WebCalendar "noSet" Variable Overwrite Vulnerability

SECUNIA ADVISORY ID:
SA24403

VERIFY ADVISORY:
http://secunia.com/advisories/24403/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
WebCalendar 1.x
http://secunia.com/product/5606/

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

Input passed to unspecified parameters is not properly verified
before being used with the "noSet" parameter set. This can be
exploited to overwrite certain variables, and allows e.g. the
inclusion of arbitrary PHP files from internal or external
resources.

The vulnerability is confirmed in version 1.0.4. Prior versions may
also be affected.

SOLUTION:
Update to version 1.0.5.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://sourceforge.net/project/shownotes.php?release_id=491130

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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