Bug 1351069 – CVE-2016-5767 gd: Integer Overflow in gdImagePaletteToTrueColor() resulting in heap overflow

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Bug 1351069 - (CVE-2016-5767) CVE-2016-5767 gd: Integer Overflow in gdImagePaletteToTrueColor() resulting in heap overflow

Summary:	CVE-2016-5767 gd: Integer Overflow in gdImagePaletteToTrueColor() resulting i...

Status:	NEW

Aliases:	CVE-2016-5767

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

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:	Huzaifa S. Sidhpurwala
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20160623,repor...
Keywords:	Security

Depends On:	1351180 1356812 1356813
Blocks:	1323912 1351183
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Reported:	2016-06-29 03:19 EDT by Andrej Nemec
Modified:	2018-06-29 18:12 EDT (History)
CC List:	12 users (show)

See Also:
Fixed In Version:	php 5.5.37, php 5.6.23
Doc Type:	If docs needed, set a value
Doc Text:	An integer overflow flaw, leading to a heap-based buffer overflow was found in the gdImagePaletteToTrueColor() function of PHP's gd extension. A remote attacker could use this flaw to crash a PHP application or execute arbitrary code with the privileges of the user running that PHP application using gd via a specially crafted image buffer.
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2016:2598	normal	SHIPPED_LIVE	Moderate: php security and bug fix update	2016-11-03 08:12:00 EDT
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 Andrej Nemec 2016-06-29 03:19:53 EDT

The gdImagePaletteToTrueColor() is prone to an integer overflow, which result in heap based overflow.

Upstream bug:

https://bugs.php.net/bug.php?id=72446

Upstream patch:

http://git.php.net/?p=php-src.git;a=commitdiff;h=c395c6e5d7e8df37a21265ff76e48fe75ceb5ae6

CVE assignment:

http://seclists.org/oss-sec/2016/q2/589

Comment 1 Andrej Nemec 2016-06-29 08:04:49 EDT

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1351180]

Comment 2 Fedora Update System 2016-07-02 11:27:37 EDT

php-5.6.23-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2016-07-02 15:22:26 EDT

php-5.6.23-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2016-07-02 15:27:44 EDT

php-5.6.23-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Huzaifa S. Sidhpurwala 2016-07-11 06:07:15 EDT

Analysis:

This is triggered when a very large image created by imagecreate() is passed to imagepalettetotruecolor(), which triggers an integer overflow followed by heap-buffer overflow.

From a php point of view, this needs to be triggered by an attacker controlled imagecreate(), which is very unlikely situation.

Comment 8 errata-xmlrpc 2016-11-03 17:05:17 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2598 https://rhn.redhat.com/errata/RHSA-2016-2598.html

Comment 10 errata-xmlrpc 2016-11-15 06:41:27 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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