Bug 1391068 (CVE-2016-8670)

Summary:	CVE-2016-8670 php: Stack based buffer overflow in dynamicGetbuf
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, databases-maint, dmcphers, dmoppert, fedora, hhorak, jialiu, jmlich83, jokerman, jorton, kseifried, lmeyer, mmccomas, mskalick, rcollet, sardella, tiwillia, trepik, varekova, webstack-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php 5.6.27, php 7.0.11, php 7.1.0	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in gd. Integer underflow in a calculation in dynamicGetbuf() was incorrectly handled, leading in some circumstances to an out of bounds write through a very large argument to memcpy(). An attacker could create a crafted image that would lead to a crash or, potentially, code execution.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-02-21 09:39:45 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:	1391076, 1391077
Bug Blocks:	1404738

Description Adam Mariš 2016-11-02 14:01:19 UTC

Stack based buffer overflow was found in dynamicGetbuf when passing negative `rlen` as size to memcpy().

PHP bug:

https://bugs.php.net/bug.php?id=73280

GD patch:

https://github.com/libgd/libgd/commit/53110871935244816bbb9d131da0bccff734bfe9

PHP patch:

https://git.php.net/?p=php-src.git;a=commit;h=cc08cbc84d46933c1e9e0149633f1ed5d19e45e9

CVE assignment:

http://www.openwall.com/lists/oss-security/2016/10/15/6

Comment 1 Adam Mariš 2016-11-02 14:11:05 UTC

Created gd tracking bugs for this issue:

Affects: fedora-all [bug 1391077]

Comment 2 Adam Mariš 2016-11-02 14:11:18 UTC

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1391076]