Bug 1315308

Summary:	php: Segmentation fault in mysql_driver.c
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	abhgupta, dmcphers, fedora, jialiu, jokerman, jorton, kseifried, lmeyer, mmaslano, mmccomas, rcollet, tiwillia, webstack-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php 5.6.19	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-06-13 17:49:49 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1315309
Bug Blocks:	1315348

Description Adam Mariš 2016-03-07 12:52:53 UTC

Segmentation fault in mysql_driver.c was found. When Z_TYPE is 0 (IS_NULL) then convert_to_string() returns value obtained from STR_EMPTY_ALLOC(). In turn, STR_EMPTY_ALLOC() returns a value of CG(interned_empty_string). Applying efree() on this value later causes crash. This issue was introduced by commit http://git.php.net/?p=php-src.git;a=commit;h=ef1bd8f0e6f88b1d123cea1c0b5079cfde7f90df

Upstream bug:

https://bugs.php.net/bug.php?id=71569

Upstream patch:

http://git.php.net/?p=php-src.git;a=commit;h=bc419fee5c9704eb4ce338acacbc2380c6f4427d

Comment 1 Adam Mariš 2016-03-07 12:54:05 UTC

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1315309]

Comment 2 Remi Collet 2016-03-07 13:05:16 UTC

Please explain how this is considered as a security issue, especially as it requires some crafted script.

Comment 3 Tomas Hoger 2016-06-13 17:49:49 UTC

Agree this is not a security issue.

Additionally, it was identified in the upstream bug that the problem was only introduced via a fix for the following upstream bug:

https://bugs.php.net/bug.php?id=70389

first used in PHP version 5.6.14.