CVE-2016-5768

php: Double free in _php_mb_regex_ereg_replace_exec

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Double free vulnerability in the _php_mb_regex_ereg_replace_exec function in php_mbregex.c in the mbstring extension in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) by leveraging a callback exception.

Vulnerabilidad de liberación doble en la función _php_mb_regex_ereg_replace_exec en php_mbregex.c en la extensión mbstring 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 ejecutar un código arbitrario o provocar una denegación de servicio (caída de aplicación) mediante el aprovechamiento de una excepción de devolución de llamada.

A double free flaw was found in the mb_ereg_replace_callback() function of php which is used to perform regex search. This flaw could possibly cause a PHP application to crash.

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

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

None

Integrity

None

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
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-415: Double Free
CWE-416: Use After Free

CAPEC

References (16)

URL	Tag	Source
http://github.com/php/php-src/commit/5b597a2e5b28e2d5a52fc1be13f425f08f47cb62?w=1	X_refsource_confirm
http://php.net/ChangeLog-7.php	Release Notes
http://www.openwall.com/lists/oss-security/2016/06/23/4	Mailing List
http://www.securityfocus.com/bid/91396	Vdb Entry
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731	X_refsource_confirm
https://support.apple.com/HT207170	X_refsource_confirm

URL	Date	SRC
https://bugs.php.net/bug.php?id=72402	2024-08-06

URL	Date	SRC
http://php.net/ChangeLog-5.php	2018-01-05

URL	Date	SRC
http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html	2018-01-05
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html	2018-01-05
http://lists.opensuse.org/opensuse-updates/2016-08/msg00003.html	2018-01-05
http://rhn.redhat.com/errata/RHSA-2016-2598.html	2018-01-05
http://rhn.redhat.com/errata/RHSA-2016-2750.html	2018-01-05
http://www.debian.org/security/2016/dsa-3618	2018-01-05
https://access.redhat.com/security/cve/CVE-2016-5768	2016-11-15
https://bugzilla.redhat.com/show_bug.cgi?id=1351168	2016-11-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
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"		-		Affected
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		Affected
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		Affected
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		Affected
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		Affected
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		Affected
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		Affected
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		Affected
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		Affected
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		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected
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"		-		Affected