CVE Vulnerabilities

CVE-2016-7479

Use After Free

Published: Jan 12, 2017 | Modified: Apr 20, 2025
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
8.1 MODERATE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM

In all versions of PHP 7, during the unserialization process, resizing the properties hash table of a serialized object may lead to use-after-free. A remote attacker may exploit this bug to gain arbitrary code execution.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
Php Php 7.0.0 (including) 7.0.0 (including)
Php Php 7.0.1 (including) 7.0.1 (including)
Php Php 7.0.2 (including) 7.0.2 (including)
Php Php 7.0.3 (including) 7.0.3 (including)
Php Php 7.0.4 (including) 7.0.4 (including)
Php Php 7.0.5 (including) 7.0.5 (including)
Php Php 7.0.6 (including) 7.0.6 (including)
Php Php 7.0.7 (including) 7.0.7 (including)
Php Php 7.0.8 (including) 7.0.8 (including)
Php Php 7.0.9 (including) 7.0.9 (including)
Php Php 7.0.10 (including) 7.0.10 (including)
Php Php 7.0.11 (including) 7.0.11 (including)
Php Php 7.0.12 (including) 7.0.12 (including)
Php Php 7.0.14 (including) 7.0.14 (including)
Php Php 7.1.0 (including) 7.1.0 (including)
Red Hat Software Collections for Red Hat Enterprise Linux 6 RedHat rh-php70-php-0:7.0.27-1.el6 *
Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS RedHat rh-php70-php-0:7.0.27-1.el6 *
Red Hat Software Collections for Red Hat Enterprise Linux 7 RedHat rh-php70-php-0:7.0.27-1.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS RedHat rh-php70-php-0:7.0.27-1.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS RedHat rh-php70-php-0:7.0.27-1.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS RedHat rh-php70-php-0:7.0.27-1.el7 *
Php5 Ubuntu esm-infra-legacy/trusty *
Php5 Ubuntu precise *
Php5 Ubuntu trusty *
Php5 Ubuntu trusty/esm *
Php7.0 Ubuntu devel *
Php7.0 Ubuntu esm-infra/xenial *
Php7.0 Ubuntu upstream *
Php7.0 Ubuntu xenial *
Php7.0 Ubuntu yakkety *

Potential Mitigations

References