Bug 1359828 – CVE-2016-6297 php: Stack-based buffer overflow vulnerability in php_stream_zip_opener

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Bug 1359828 - (CVE-2016-6297) CVE-2016-6297 php: Stack-based buffer overflow vulnerability in php_stream_zip_opener

Summary:	CVE-2016-6297 php: Stack-based buffer overflow vulnerability in php_stream_zi...

Status:	CLOSED ERRATA

Aliases:	CVE-2016-6297

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=20160630,reported=2...
Keywords:	Security

Depends On:	1359837
Blocks:	1359830
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Reported:	2016-07-25 10:00 EDT by Adam Mariš
Modified:	2016-11-15 13:29 EST (History)
CC List:	14 users (show)

See Also:
Fixed In Version:	php 5.5.38, php 5.6.24, php 7.0.9
Doc Type:	If docs needed, set a value
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-09-26 14:18:12 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2016:2750	normal	SHIPPED_LIVE	Moderate: rh-php56 security, bug fix, and enhancement update	2016-11-15 11:40:02 EST

Groups: None (edit)

Description Adam Mariš 2016-07-25 10:00:57 EDT

It was found that when opening a zip stream, php_stream_zip_opener fails to check the path_len that is vulnerable to integer overflow. It is later used to calculate the length of mempcy that can lead to buffer overflow and memory corruption.

Upstream bug:

https://bugs.php.net/bug.php?id=72520

Upstream patch:

http://git.php.net/?p=php-src.git;a=commit;h=81406c0c1d45f75fcc7972ed974d2597abb0b9e9

CVE assignment:

http://seclists.org/oss-sec/2016/q3/137

Comment 1 Adam Mariš 2016-07-25 10:10:15 EDT

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1359837]

Comment 2 Stefan Cornelius 2016-09-21 05:17:09 EDT

The affected function has to be used in a very specific way. It's unlikely that this function is used in a way that lends it to exploitation.

Compile time buffer overflow protection should mitigate this problem, preventing exploitation to gain code execution. Thus, this should be limited to a crash only.

Comment 3 errata-xmlrpc 2016-11-15 06:44:26 EST

This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS

Via RHSA-2016:2750 https://rhn.redhat.com/errata/RHSA-2016-2750.html

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