Bug 1336784 – CVE-2015-4116 php: Use-after-free vulnerability in the spl_ptr_heap_insert function

Bugzilla will be upgraded to version 5.0 on a still to be determined date in the near future. The original upgrade date has been delayed.

Bug 1336784 - (CVE-2015-4116) CVE-2015-4116 php: Use-after-free vulnerability in the spl_ptr_heap_insert function

Summary:	CVE-2015-4116 php: Use-after-free vulnerability in the spl_ptr_heap_insert fu...

Status:	CLOSED WONTFIX

Aliases:	CVE-2015-4116

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20150610,reported=2...
Keywords:	Security

Depends On:
Blocks:	1336786
	Show dependency tree / graph

Reported:	2016-05-17 08:46 EDT by Andrej Nemec
Modified:	2016-05-19 15:56 EDT (History)
CC List:	13 users (show)

See Also:
Fixed In Version:	php 5.5.27, php 5.6.11
Doc Type:	If docs needed, set a value
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-05-19 11:05:27 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Andrej Nemec 2016-05-17 08:46:30 EDT

Use-after-free vulnerability in the spl_ptr_heap_insert function in
ext/spl/spl_heap.c in PHP before 5.5.27 and 5.6.x before 5.6.11 allows
remote attackers to execute arbitrary code by triggering a failed
SplMinHeap::compare operation.


Upstream bugs:

https://bugs.php.net/bug.php?id=69737
https://bugs.php.net/bug.php?id=69721

Upstream fix:

http://git.php.net/?p=php-src.git;a=commit;h=1cbd25ca15383394ffa9ee8601c5de4c0f2f90e1

Comment 1 Tomas Hoger 2016-05-19 11:05:27 EDT

This flaw is triggered by a fatal error generated in SplMinHeap::compare.  To achieve that reporters created a PHP script which overrides compare method with a custom one that throws such error.  Triggering this without a malicious script is unlikely.  Upstream did not consider this to be a security issue - type of both upstream bug was changed form Security to Bug.  Reporters also assume local attack vector, which implies malicious script author.  PHP has never been safe against malicious scripts, and removal of the safe mode feature in PHP 5.4 acknowledges that:

http://php.net/manual/en/features.safe-mode.php

There is no plan to address this in Red Hat products.

Note You need to log in before you can comment on or make changes to this bug.