CVE-2016-5766

gd: Integer overflow in _gd2GetHeader() resulting in heap overflow

Severity Score

8.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Integer overflow in the _gd2GetHeader function in gd_gd2.c in the GD Graphics Library (aka libgd) before 2.2.3, as used in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8, allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via crafted chunk dimensions in an image.

Desbordamiento de entero en la función _gd2GetHeader en gd_gd2.c en la GD Graphics Library (también conocido como libgd) en versiones anteriores a 2.2.3, como se utiliza en PHP en versiones anteriores a 5.5.37, 5.6.x en versiones anteriores a 5.6.23 y 7.x en versiones anteriores a 7.0.8, permite a atacantes remotos provocar una denegación de servicio (desbordamiento de búfer basado en memoria dinámica y caída de aplicación) o posiblemente tener otro impacto no especificado a través de dimensiones del pedazo en una imagen manipulada.

An integer overflow flaw, leading to a heap-based buffer overflow was found in the imagecreatefromgd2() 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 GD2 image.

PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Server. The rh-php56 packages provide a recent stable release of PHP with PEAR 1.9.5 and enhanced language features including constant expressions, variadic functions, arguments unpacking, and the interactive debuger. The memcache, mongo, and XDebug extensions are also included. The rh-php56 Software Collection has been upgraded to version 5.6.25, which provides a number of bug fixes and enhancements over the previous version. Security Fixes in the rh-php56-php component have been added.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-06-23 CVE Reserved
2016-06-26 CVE Published
2024-08-06 CVE Updated
2024-08-06 First Exploit
2025-07-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-122: Heap-based Buffer Overflow
CWE-190: Integer Overflow or Wraparound

CAPEC

References (17)

URL	Tag	Source
http://php.net/ChangeLog-5.php	Release Notes
http://php.net/ChangeLog-7.php	Release Notes
http://www.openwall.com/lists/oss-security/2016/06/23/4	Mailing List
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731	X_refsource_confirm
https://libgd.github.io/release-2.2.3.html	Release Notes

URL	Date	SRC
http://github.com/php/php-src/commit/7722455726bec8c53458a32851d2a87982cf0eac?w=1	2024-08-06
https://bugs.php.net/bug.php?id=72339	2024-08-06

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html	2019-04-22
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00025.html	2019-04-22
http://lists.opensuse.org/opensuse-updates/2016-08/msg00003.html	2019-04-22
http://rhn.redhat.com/errata/RHSA-2016-2598.html	2019-04-22
http://rhn.redhat.com/errata/RHSA-2016-2750.html	2019-04-22
http://www.debian.org/security/2016/dsa-3619	2019-04-22
http://www.ubuntu.com/usn/USN-3030-1	2019-04-22
https://security.gentoo.org/glsa/201612-09	2019-04-22
https://access.redhat.com/security/cve/CVE-2016-5766	2020-12-15
https://bugzilla.redhat.com/show_bug.cgi?id=1351068	2020-12-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	<= 5.5.36 Search vendor "Php" for product "Php" and version " <= 5.5.36"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.0 Search vendor "Php" for product "Php" and version "5.6.0"	alpha1	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.0 Search vendor "Php" for product "Php" and version "5.6.0"	alpha2	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.0 Search vendor "Php" for product "Php" and version "5.6.0"	alpha3	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.0 Search vendor "Php" for product "Php" and version "5.6.0"	alpha4	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.0 Search vendor "Php" for product "Php" and version "5.6.0"	alpha5	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.0 Search vendor "Php" for product "Php" and version "5.6.0"	beta1	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.0 Search vendor "Php" for product "Php" and version "5.6.0"	beta2	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.0 Search vendor "Php" for product "Php" and version "5.6.0"	beta3	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.0 Search vendor "Php" for product "Php" and version "5.6.0"	beta4	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.1 Search vendor "Php" for product "Php" and version "5.6.1"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.2 Search vendor "Php" for product "Php" and version "5.6.2"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.3 Search vendor "Php" for product "Php" and version "5.6.3"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.4 Search vendor "Php" for product "Php" and version "5.6.4"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.5 Search vendor "Php" for product "Php" and version "5.6.5"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.6 Search vendor "Php" for product "Php" and version "5.6.6"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.7 Search vendor "Php" for product "Php" and version "5.6.7"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.8 Search vendor "Php" for product "Php" and version "5.6.8"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.9 Search vendor "Php" for product "Php" and version "5.6.9"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.10 Search vendor "Php" for product "Php" and version "5.6.10"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.11 Search vendor "Php" for product "Php" and version "5.6.11"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.12 Search vendor "Php" for product "Php" and version "5.6.12"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.13 Search vendor "Php" for product "Php" and version "5.6.13"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.14 Search vendor "Php" for product "Php" and version "5.6.14"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.15 Search vendor "Php" for product "Php" and version "5.6.15"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.16 Search vendor "Php" for product "Php" and version "5.6.16"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.17 Search vendor "Php" for product "Php" and version "5.6.17"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.18 Search vendor "Php" for product "Php" and version "5.6.18"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.19 Search vendor "Php" for product "Php" and version "5.6.19"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.20 Search vendor "Php" for product "Php" and version "5.6.20"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.21 Search vendor "Php" for product "Php" and version "5.6.21"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	5.6.22 Search vendor "Php" for product "Php" and version "5.6.22"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	7.0.0 Search vendor "Php" for product "Php" and version "7.0.0"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	7.0.1 Search vendor "Php" for product "Php" and version "7.0.1"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	7.0.2 Search vendor "Php" for product "Php" and version "7.0.2"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	7.0.3 Search vendor "Php" for product "Php" and version "7.0.3"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	7.0.4 Search vendor "Php" for product "Php" and version "7.0.4"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	7.0.5 Search vendor "Php" for product "Php" and version "7.0.5"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	7.0.6 Search vendor "Php" for product "Php" and version "7.0.6"	-	Safe
Libgd Search vendor "Libgd"	Libgd Search vendor "Libgd" for product "Libgd"	2.2.2 Search vendor "Libgd" for product "Libgd" and version "2.2.2"	-	Affected	in	Php Search vendor "Php"	Php Search vendor "Php" for product "Php"	7.0.7 Search vendor "Php" for product "Php" and version "7.0.7"	-	Safe
Redhat Search vendor "Redhat"		Openshift Search vendor "Redhat" for product "Openshift"				2.0 Search vendor "Redhat" for product "Openshift" and version "2.0"		enterprise		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				8.3 Search vendor "Freebsd" for product "Freebsd" and version "8.3"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				6.0 Search vendor "Redhat" for product "Enterprise Linux" and version "6.0"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				8.0 Search vendor "Freebsd" for product "Freebsd" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				5 Search vendor "Redhat" for product "Enterprise Linux" and version "5"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.0 Search vendor "Freebsd" for product "Freebsd" and version "10.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				23 Search vendor "Fedoraproject" for product "Fedora" and version "23"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.1 Search vendor "Freebsd" for product "Freebsd" and version "10.1"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				24 Search vendor "Fedoraproject" for product "Fedora" and version "24"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				8.4 Search vendor "Freebsd" for product "Freebsd" and version "8.4"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				9.2 Search vendor "Freebsd" for product "Freebsd" and version "9.2"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				8.2 Search vendor "Freebsd" for product "Freebsd" and version "8.2"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				8.1 Search vendor "Freebsd" for product "Freebsd" and version "8.1"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				9.0 Search vendor "Freebsd" for product "Freebsd" and version "9.0"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.2 Search vendor "Freebsd" for product "Freebsd" and version "10.2"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				22 Search vendor "Fedoraproject" for product "Fedora" and version "22"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				9.3 Search vendor "Freebsd" for product "Freebsd" and version "9.3"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.3 Search vendor "Freebsd" for product "Freebsd" and version "10.3"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				9.1 Search vendor "Freebsd" for product "Freebsd" and version "9.1"		-		Affected