Bug 951562 (CVE-2013-1939)

Summary:	CVE-2013-1939 php-sabredav-Sabre_DAV: Local file exposure due improper icons / images path checking in the HTML Browser plug-in
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	jmarrero
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	SabreDAV 1.6.9, SabreDAV 1.7.7, SabreDav 1.8.5	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-08-28 18:57:16 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:	951568, 951569
Bug Blocks:

Description Jan Lieskovsky 2013-04-12 13:38:02 UTC

A local file exposure flaw was found in the way HTML browser plug-in of SabreDAV, a WebDAV framework for the PHP language, processed certain file system paths for icon and image files on certain platforms. A remote attacker could provide a specially-crafted icon / image file location that, when processed by an application using the SabreDav framework, would allow them to (remotely) obtain arbitary system file, accessible with the privileges of that SabreDAV application.

References:
[1] https://groups.google.com/forum/?fromgroups=#!topic/sabredav-discuss/ehOUu7wTSGQ
[2] http://www.openwall.com/lists/oss-security/2013/04/11/3

Relevant upstream patch (seems to be the following):
[3] https://github.com/evert/SabreDAV/commit/5f6d71b2c4e2d3c6fc32c20afe7331e38877c489

Comment 1 Jan Lieskovsky 2013-04-12 13:40:05 UTC

This issue affects the versions of the php-sabredav-Sabre_DAV package, as shipped with Fedora release of 17 and 18. Please schedule an update.

--

This issue affects the version of the php-sabredav-Sabre_DAV package, as shipped with Fedora EPEL-6. Please schedule an update.

Comment 2 Jan Lieskovsky 2013-04-12 13:41:08 UTC

Created php-sabredav-Sabre_DAV tracking bugs for this issue

Affects: fedora-all [bug 951568]
Affects: epel-6 [bug 951569]

Comment 3 Jan Lieskovsky 2013-04-12 13:58:07 UTC

Suggested workaround (from [1]):
---------------------------------
As a workaround, you setup the plugin as such:

// 1.8
$plugin = new Sabre\DAV\Browser\Plugin(true, false);

// 1.6, 1.7
$plugin = new Sabre_DAV_Browser_Plugin(true, false);

To disable this feature completely.

Comment 4 Fedora Update System 2013-05-24 19:09:46 UTC

php-sabredav-Sabre_DAV-1.6.5-5.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Joseph Marrero 2013-08-28 18:57:16 UTC

Fixed back porting the upstream fix. Been fixed since 05/24/2013.