CVE-2015-6831

php: Use After Free Vulnerability in unserialize()

Severity Score

7.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Multiple use-after-free vulnerabilities in SPL in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 allow remote attackers to execute arbitrary code via vectors involving (1) ArrayObject, (2) SplObjectStorage, and (3) SplDoublyLinkedList, which are mishandled during unserialization.

Múltiples vulnerabilidades de uso después de liberación de memoria en SPL en PHP en versiones anteriores a 5.4.44, 5.5.x en versiones anteriores a 5.5.28 y 5.6.x en versiones anteriores a 5.6.12 permiten a atacantes remotos ejecutar código arbitrario involucrando vectores (1) ArrayObject, (2) SplObjectStorage y (3) SplDoublyLinkedList, los cuales no son manejados adecuadamente durante la deserialización.

A flaw was discovered in the way PHP performed object unserialization. Specially crafted input processed by the unserialize() function could cause a PHP application to crash or, possibly, execute arbitrary code.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

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

2015-09-08 CVE Reserved
2015-10-01 CVE Published
2023-11-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (11)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2015/08/19/3	Mailing List
http://www.php.net/ChangeLog-5.php	X_refsource_confirm
http://www.securityfocus.com/bid/76737	Vdb Entry
https://bugs.php.net/bug.php?id=70155	X_refsource_confirm
https://bugs.php.net/bug.php?id=70166	X_refsource_confirm
https://bugs.php.net/bug.php?id=70168	X_refsource_confirm
https://bugs.php.net/bug.php?id=70169	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://www.debian.org/security/2015/dsa-3344	2023-11-07
https://security.gentoo.org/glsa/201606-10	2023-11-07
https://access.redhat.com/security/cve/CVE-2015-6831	2016-03-15
https://bugzilla.redhat.com/show_bug.cgi?id=1256290	2016-03-15

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"				< 5.4.44 Search vendor "Php" for product "Php" and version " < 5.4.44"		-		Affected
Php Search vendor "Php"		Php Search vendor "Php" for product "Php"				>= 5.5.0 < 5.5.28 Search vendor "Php" for product "Php" and version " >= 5.5.0 < 5.5.28"		-		Affected
Php Search vendor "Php"		Php Search vendor "Php" for product "Php"				>= 5.6.0 < 5.6.12 Search vendor "Php" for product "Php" and version " >= 5.6.0 < 5.6.12"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		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