6.5
MEDIUM
CVE-2015-9253
Apache PHP CPU Exhaustion and Log File Flooding Vulnerability
Description

An issue was discovered in PHP 7.3.x before 7.3.0alpha3, 7.2.x before 7.2.8, and before 7.1.20. The php-fpm master process restarts a child process in an endless loop when using program execution functions (e.g., passthru, exec, shell_exec, or system) with a non-blocking STDIN stream, causing this master process to consume 100% of the CPU, and consume disk space with a large volume of error logs, as demonstrated by an attack by a customer of a shared-hosting facility.

INFO

Published Date :

Feb. 19, 2018, 7:29 p.m.

Last Modified :

Feb. 19, 2020, 12:15 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2015-9253 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Php php
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2015-9253.

URL Resource
https://bugs.php.net/bug.php?id=70185 Exploit Issue Tracking Vendor Advisory
https://bugs.php.net/bug.php?id=73342https://github.com/php/php-src/pull/3287 Exploit Issue Tracking Vendor Advisory
https://bugs.php.net/bug.php?id=75968 Exploit Issue Tracking Vendor Advisory
https://github.com/php/php-src/blob/PHP-7.1.20/NEWS#L20-L22 Third Party Advisory
https://github.com/php/php-src/commit/69dee5c732fe982c82edb17d0dbc3e79a47748d8 Patch Third Party Advisory
https://usn.ubuntu.com/3766-1/ Third Party Advisory
https://usn.ubuntu.com/4279-1/
https://www.futureweb.at/security/CVE-2015-9253/ Exploit Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2015-9253 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2015-9253 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Feb. 19, 2020

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/4279-1/ [No Types Assigned]
  • Modified Analysis by [email protected]

    Apr. 26, 2019

    Action Type Old Value New Value
    Changed Reference Type https://github.com/php/php-src/blob/PHP-7.1.20/NEWS#L20-L22 No Types Assigned https://github.com/php/php-src/blob/PHP-7.1.20/NEWS#L20-L22 Third Party Advisory
    Changed Reference Type https://usn.ubuntu.com/3766-1/ No Types Assigned https://usn.ubuntu.com/3766-1/ Third Party Advisory
    Changed Reference Type https://bugs.php.net/bug.php?id=73342https://github.com/php/php-src/pull/3287 No Types Assigned https://bugs.php.net/bug.php?id=73342https://github.com/php/php-src/pull/3287 Exploit, Issue Tracking, Vendor Advisory
    Changed Reference Type https://bugs.php.net/bug.php?id=75968 Issue Tracking, Vendor Advisory https://bugs.php.net/bug.php?id=75968 Exploit, Issue Tracking, Vendor Advisory
    Changed Reference Type https://github.com/php/php-src/commit/69dee5c732fe982c82edb17d0dbc3e79a47748d8 No Types Assigned https://github.com/php/php-src/commit/69dee5c732fe982c82edb17d0dbc3e79a47748d8 Patch, Third Party Advisory
    Changed Reference Type https://bugs.php.net/bug.php?id=70185 Issue Tracking, Vendor Advisory https://bugs.php.net/bug.php?id=70185 Exploit, Issue Tracking, Vendor Advisory
    Changed CPE Configuration OR *cpe:2.3:a:php:php:*:*:*:*:*:*:*:* versions up to (including) 7.2.2 OR *cpe:2.3:a:php:php:*:*:*:*:*:*:*:* versions up to (excluding) 7.1.20 *cpe:2.3:a:php:php:*:*:*:*:*:*:*:* versions from (including) 7.2.0 up to (excluding) 7.2.8 *cpe:2.3:a:php:php:7.3.0:alpha1:*:*:*:*:*:* *cpe:2.3:a:php:php:7.3.0:alpha2:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Sep. 18, 2018

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/3766-1/ [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 26, 2018

    Action Type Old Value New Value
    Added Reference https://github.com/php/php-src/blob/PHP-7.1.20/NEWS#L20-L22 [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 11, 2018

    Action Type Old Value New Value
    Changed Description An issue was discovered in PHP through 7.2.2. The php-fpm master process restarts a child process in an endless loop when using program execution functions (e.g., passthru, exec, shell_exec, or system) with a non-blocking STDIN stream, causing this master process to consume 100% of the CPU, and consume disk space with a large volume of error logs, as demonstrated by an attack by a customer of a shared-hosting facility. An issue was discovered in PHP 7.3.x before 7.3.0alpha3, 7.2.x before 7.2.8, and before 7.1.20. The php-fpm master process restarts a child process in an endless loop when using program execution functions (e.g., passthru, exec, shell_exec, or system) with a non-blocking STDIN stream, causing this master process to consume 100% of the CPU, and consume disk space with a large volume of error logs, as demonstrated by an attack by a customer of a shared-hosting facility.
    Added Reference https://github.com/php/php-src/commit/69dee5c732fe982c82edb17d0dbc3e79a47748d8 [No Types Assigned]
    Added Reference https://bugs.php.net/bug.php?id=73342https://github.com/php/php-src/pull/3287 [No Types Assigned]
  • Initial Analysis by [email protected]

    Mar. 18, 2018

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:S/C:N/I:N/A:C)
    Added CVSS V3 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://www.futureweb.at/security/CVE-2015-9253/ No Types Assigned https://www.futureweb.at/security/CVE-2015-9253/ Exploit, Third Party Advisory
    Changed Reference Type https://bugs.php.net/bug.php?id=75968 No Types Assigned https://bugs.php.net/bug.php?id=75968 Issue Tracking, Vendor Advisory
    Changed Reference Type https://bugs.php.net/bug.php?id=70185 No Types Assigned https://bugs.php.net/bug.php?id=70185 Issue Tracking, Vendor Advisory
    Added CWE CWE-400
    Added CPE Configuration OR *cpe:2.3:a:php:php:*:*:*:*:*:*:*:* versions up to (including) 7.2.2
  • CVE Modified by [email protected]

    Mar. 03, 2018

    Action Type Old Value New Value
    Removed Reference https://www.futureweb.at/Futureweb-OG-php-fpm-master-process-restarts-child-process-in-a_pid,54177,type,firmeninfo.html [No Types Assigned]
    Added Reference https://www.futureweb.at/security/CVE-2015-9253/ [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2015-9253 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2015-9253 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.58 }} -0.01%

score

0.75832

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability