CVE-2022-4900 Potential buffer overflow in php_cli_server_startup_workers
Setting a large PHP_CLI_SERVER_WORKERS value causes a heap buffer overflow in the PHP CLI server, potentially allowing code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-4900?
CVE-2022-4900 is a medium-severity memory corruption vulnerability in Php Php, published on 2 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in PHP where setting the environment variable PHP_CLI_SERVER_WORKERS to a large value leads to a heap buffer overflow.
Which versions are affected by CVE-2022-4900?
3 open source packages ship an affected version, including libphp, php and php-min. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
libphp Bitnami | From 7.4.0 | 8.0.22 |
php Bitnami | From 7.4.0 | 8.0.22 |
php-min Bitnami | From 7.4.0 | 8.0.22 |
Linux distribution packages (14)
apache2-mod_php7 SUSE:Linux Enterprise Module for Legacy 15 SP4 | All versions | 7.4.33-150400.4.22.1 |
php7 SUSE:Linux Enterprise Module for Legacy 15 SP4 | All versions | 7.4.33-150400.4.22.1 |
php7-fastcgi SUSE:Linux Enterprise Module for Legacy 15 SP4 | All versions | 7.4.33-150400.4.22.1 |
php7-fpm SUSE:Linux Enterprise Module for Legacy 15 SP4 | All versions | 7.4.33-150400.4.22.1 |
php7-embed SUSE:Linux Enterprise Module for Package Hub 15 SP4 | All versions | 7.4.33-150400.4.22.1 |
php74 SUSE:Linux Enterprise Module for Web and Scripting 12 | All versions | 7.4.33-1.56.1 |
php74 SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 7.4.33-1.56.1 |
apache2-mod_php7 openSUSE:Leap 15.4 | All versions | 7.4.33-150400.4.22.1 |
php7 openSUSE:Leap 15.4 | All versions | 7.4.33-150200.3.54.1 |
php7 openSUSE:Leap 15.4 | All versions | 7.4.33-150400.4.22.1 |
php7-embed openSUSE:Leap 15.4 | All versions | 7.4.33-150400.4.22.1 |
php7-fastcgi openSUSE:Leap 15.4 | All versions | 7.4.33-150400.4.22.1 |
php7-fpm openSUSE:Leap 15.4 | All versions | 7.4.33-150400.4.22.1 |
php7-test openSUSE:Leap 15.4 | All versions | 7.4.33-150400.4.22.2 |
Products include Php Php, Redhat Enterprise Linux, Redhat Software Collections.
How do I fix CVE-2022-4900?
Upgrade libphp to 8.0.22 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-4900 being exploited?
There is no known exploitation of CVE-2022-4900 in the wild and no public exploit code.
Other vulnerabilities in Php Php
Sources
Also known as BIT-libphp-2022-4900, BIT-php-2022-4900, BIT-php-min-2022-4900, DEBIAN-CVE-2022-4900, GHSA-95cc-jq89-8hvw, SUSE-SU-2023:1583-1 and 3 more.