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TITLE:
Drupal Comment Preview Arbitrary Code Execution

SECUNIA ADVISORY ID:
SA23960

VERIFY ADVISORY:
http://secunia.com/advisories/23960/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Drupal 4.x
http://secunia.com/product/342/
Drupal 5.x
http://secunia.com/product/13378/

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

The vulnerability is caused due to an input sanitation error when
processing previews on comments, which can be exploited to execute
arbitrary code.

Successful exploitation requires "post comments" privileges and
access to multiple input filters (not the default).

The vulnerability is reported in Drupal 4.7.x branch prior to version
4.7.6 and Drupal 5.x branch prior to version 5.1.

SOLUTION:
Apply patches or update to version 4.7.6 and 5.1.

Patch for Drupal 4.7.5:
http://drupal.org/files/sa-2007-005/SA-2007-005-4.7.5.patch

Patch for Drupal 5.0:
http://drupal.org/files/sa-2007-005/SA-2007-005-5.0.patch

Drupal 4.7.6:
http://ftp.osuosl.org/pub/drupal/files/projects/drupal-4.7.6.tar.gz

Drupal 5.1:
http://ftp.osuosl.org/pub/drupal/files/projects/drupal-5.1.tar.gz

PROVIDED AND/OR DISCOVERED BY:
Drupal Security Team

ORIGINAL ADVISORY:
http://drupal.org/node/113935

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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.

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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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