CVE-2024-4577

PHP Group PHP: PHP-CGI OS Command Injection

As of , CVE-2024-4577 in PHP Group PHP is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 12 June 2024
US federal deadline
3 July 202421 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Known
EPSS score
0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.28 on 12 June 2024EPSS on the day CISA listed it.
Public exploit
1 Metasploit module and 1 Exploit-DB entry
Fix
Vendor advice: www.php.netLinks below, from CISA's entry.

What CISA says to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA's required action

  • www.php.netThis vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check…

What the flaw is

PHP, specifically Windows-based PHP used in CGI mode, contains an OS command injection vulnerability that allows for arbitrary code execution. This vulnerability is a patch bypass for CVE-2012-1823.

CISA's description

In PHP versions 8.1.* before 8.1.29, 8.2.* before 8.2.20, 8.3.* before 8.3.8, when using Apache and PHP-CGI on Windows, if the system is set up to use certain code pages, Windows may use "Best-Fit" behavior to replace characters in command line given to Win32 API functions. PHP CGI module may misinterpret those characters as PHP options, which may allow a malicious user to pass options to PHP binary being run, and thus reveal the source code of scripts, run arbitrary PHP code on the server, etc.

The CVE record's description, from php

CVE published
9 June 2024
Assigned by
php
CVSS
9.8 Critical (CVSS 3.1, from the CNA)
CWE-78
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.
  4. Exploit-DB published an exploit (EDB-ID 52331).

Public exploits

Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.

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