CVE-2016-6290

php: Use after free in unserialize() with Unexpected Session Deserialization

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

ext/session/session.c in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 does not properly maintain a certain hash data structure, which allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via vectors related to session deserialization.

ext/session/session.c en PHP en versiones anteriores a 5.5.38, 5.6.x en versiones anteriores a 5.6.24 y 7.x en versiones anteriores a 7.0.9 no mantiene correctamente una determinada estructura de datos hash, lo que permite a atacantes remotos provocar una denegación de servicio (uso después de liberación) o posiblemente tener otro impacto no especificado a través de vectores relacionados con deserialización de sesión.

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

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-07-24 CVE Reserved
2016-07-25 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (14)

URL	Tag	Source
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=3798eb6fd5dddb211b01d41495072fd9858d4e32	X_refsource_confirm
http://openwall.com/lists/oss-security/2016/07/24/2	Mailing List
http://php.net/ChangeLog-5.php	Release Notes
http://php.net/ChangeLog-7.php	X_refsource_confirm
http://www.securityfocus.com/bid/92097	Third Party Advisory
http://www.securitytracker.com/id/1036430	Vdb Entry
https://bugs.php.net/72562	Issue Tracking
https://support.apple.com/HT207170	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html	2023-11-07
http://rhn.redhat.com/errata/RHSA-2016-2750.html	2023-11-07
http://www.debian.org/security/2016/dsa-3631	2023-11-07
https://security.gentoo.org/glsa/201611-22	2023-11-07
https://access.redhat.com/security/cve/CVE-2016-6290	2016-11-15
https://bugzilla.redhat.com/show_bug.cgi?id=1359710	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"				<= 5.5.37 Search vendor "Php" for product "Php" and version " <= 5.5.37"		-		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"				5.6.23 Search vendor "Php" for product "Php" and version "5.6.23"		-		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"				7.0.8 Search vendor "Php" for product "Php" and version "7.0.8"		-		Affected