PHP 7.1.x < 7.1.9 Heap-based Buffer Overflow Vulnerability

critical Nessus Plugin ID 122543

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Synopsis

The version of PHP running on the remote web server is affected by a heap-based buffer overflow vulnerability.

Description

According to its banner, the version of PHP running on the remote web server is 7.1.x prior to 7.1.9. It is, therefore, affected by a heap-based buffer overflow condition exists in the ext/standard/var_unserializer.re script due to improper use of the hash API for key deletion. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to PHP version 7.1.9 or later.

Plugin Details

Severity: Critical

ID: 122543

File Name: php_7_1_9.nasl

Version: 1.6

Type: remote

Family: CGI abuses

Published: 3/1/2019

Updated: 5/26/2025

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2017-12932

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:php:php

Required KB Items: www/PHP

Exploit Ease: No known exploits are available

Patch Publication Date: 8/31/2017

Vulnerability Publication Date: 8/17/2017

Reference Information

CVE: CVE-2017-12932

BID: 100427

Detections

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