Bug 1255795 (CVE-2015-7809)

Summary:	CVE-2015-7809 php-twig: Remote code execution via Twig templates
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	fedora, shawn
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php-twig-1.20.0	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-10-12 07:47:55 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:	1255796, 1255797, 1255798
Bug Blocks:

Description Adam Mariš 2015-08-21 15:01:25 UTC

Vulnerability can be exploited when end users are allowed to submit Twig templates,
even if they are protected with Twig's sandbox mode.
End users can craft valid Twig code that allows them to execute arbitrary code (RCEs)
via the _self variable, which is always available, even in sandboxed templates.

All versions of Twig are affected up to 1.20.0, which fixes this bug.

Upstream patch:

https://github.com/twigphp/Twig/pull/1759

CVE request:

http://seclists.org/oss-sec/2015/q3/415

Comment 1 Adam Mariš 2015-08-21 15:02:20 UTC

Created php-twig-Twig tracking bugs for this issue:

Affects: epel-6 [bug 1255798]

Comment 2 Adam Mariš 2015-08-21 15:02:22 UTC

Created php-twig tracking bugs for this issue:

Affects: fedora-all [bug 1255796]
Affects: epel-7 [bug 1255797]

Comment 3 Fedora Update System 2015-09-06 03:56:33 UTC

php-twig-1.20.0-1.el7 has been pushed to the Fedora EPEL 7 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2015-09-06 06:21:12 UTC

php-twig-1.20.0-1.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2015-09-10 20:27:42 UTC

php-twig-1.20.0-1.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 6 Shawn Iwinski 2015-10-11 22:41:41 UTC

All dependent bugs are closed.  Would you close this tracking bug as well?

Comment 7 Adam Mariš 2015-10-12 07:47:55 UTC

Yes, thanks for resolving.

Comment 8 Martin Prpič 2015-10-13 08:08:40 UTC

CVE-2015-7809 was assigned for the following issue:

https://github.com/fabpot/Twig/commit/30be07759a3de2558da5224f127d052ecf492e8f

per:

http://seclists.org/oss-sec/2015/q4/60