Bug 454246 (CVE-2008-1502)

Summary:	CVE-2008-1502 moodle: KSES related XSS issue
Product:	[Other] Security Response	Reporter:	Tomas Hoger <thoger>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gwync
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-07-09 06:51:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	454247
Bug Blocks:

Description Tomas Hoger 2008-07-07 07:28:14 UTC

Quoting Moodle security advisory MSA-08-0008:

During internal code review performed by Allegro.pl, some weaknesses were
discovered in KSES - PHP HTML/XHTML filter. HTML filters using or based on kses
are part of many popular projects, including WordPress, Moodle, Drupal,
eGroupware, Dokeos, PHP-Nuke, Geeklog and others. Issues found range from
cross-site scripting to code execution, depending on implementation.

[...]

There is a new option "Use HTML Purifier" in 1.9, it uses a different
whitelisting technique which is considered to be much safer than KSES.

Upstream advisory:
http://moodle.org/mod/forum/discuss.php?d=95031

Fixed upstream in: 1.8.5, 1.9

Upstream patches (1.8.x CVS branch):
http://cvs.moodle.org/moodle/lib/kses.php?r1=1.3.12.3&r2=1.3.12.4
http://cvs.moodle.org/moodle/lib/weblib.php?r1=1.812.2.99&r2=1.812.2.100

F-9 and Rawhide are already using 1.9.  F-8 should probably be updated to 1.8.5
or patches above can be applied.

Comment 2 Fedora Update System 2008-07-07 14:38:52 UTC

moodle-1.8.5-1.fc8 has been submitted as an update for Fedora 8

Comment 3 Fedora Update System 2008-07-09 02:49:58 UTC

moodle-1.8.5-1.fc8 has been pushed to the Fedora 8 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 4 Red Hat Product Security 2008-07-09 06:51:24 UTC

This issue was addressed in:

Fedora:
  https://admin.fedoraproject.org/updates/F8/FEDORA-2008-6226