CVE-2016-5114

php: out-of-bounds write in fpm_log.c

Severity Score

9.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

sapi/fpm/fpm/fpm_log.c in PHP before 5.5.31, 5.6.x before 5.6.17, and 7.x before 7.0.2 misinterprets the semantics of the snprintf return value, which allows attackers to obtain sensitive information from process memory or cause a denial of service (out-of-bounds read and buffer overflow) via a long string, as demonstrated by a long URI in a configuration with custom REQUEST_URI logging.

sapi/fpm/fpm/fpm_log.c en PHP en versiones anteriores a 5.5.31, 5.6.x en versiones anteriores a 5.6.17 y 7.x en versiones anteriores a 7.0.2 malinterpreta la semántica del valor de retorno snprinfg, lo que permite a atacantes remotos obtener información sensible del proceso de memoria o provocar una denegación de servicio (lectura fuera de rango y desbordamiento de búfer) a través de una cadena larga, como se demuestra por una URl larga en una configuración con inicio de sesión REQUEST_URI personalizado.

An out-of-bounds write flaw was found in the fpm_log_write() logging function of PHP's FastCGI Process Manager service. A remote attacker could repeatedly send maliciously crafted requests to force FPM to exhaust file system space, creating a denial of service and preventing further logging.

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

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-05-28 CVE Reserved
2016-08-02 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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-125: Out-of-bounds Read
CWE-787: Out-of-bounds Write

CAPEC

References (10)

URL	Tag	Source
http://github.com/php/php-src/commit/2721a0148649e07ed74468f097a28899741eb58f?w=1	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2016/05/29/1	Mailing List
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731	X_refsource_confirm

URL	Date	SRC
https://bugs.php.net/bug.php?id=70755	2024-08-06

URL	Date	SRC
http://php.net/ChangeLog-5.php	2018-01-05
http://php.net/ChangeLog-7.php	2018-01-05
http://www.search-lab.hu/about-us/news/111-some-unusual-vulnerabilities-in-the-php-engine	2018-01-05

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2016-2750.html	2018-01-05
https://access.redhat.com/security/cve/CVE-2016-5114	2016-11-15
https://bugzilla.redhat.com/show_bug.cgi?id=1297710	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"				<= 5.5.30 Search vendor "Php" for product "Php" and version " <= 5.5.30"		-		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"				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