CVE-2024-4577
PHP-CGI OS Command Injection Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 July 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 99.99% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · first 15 June 2025
- CISA KEV
- Listed 12 June 2024 · due 3 July 2024 · used in ransomware campaigns
- Weakness
- CWE-78
- Affected
- php/php · fedoraproject/fedora
- Source
- security@php.net
EPSS 100.0% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://www.php.net/ChangeLog-8.php#; https://nvd.nist.gov/vuln/detail/CVE-2024-4577
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://www.openwall.com/lists/oss-security/2024/06/07/1Mailing List, Third Party Advisory
- https://arstechnica.com/security/2024/06/php-vulnerability-allows-attackers-to-run-malicious-code-on-windows-servers/Exploit, Press/Media Coverage, Third Party Advisory
- https://blog.orange.tw/2024/06/cve-2024-4577-yet-another-php-rce.htmlThird Party Advisory
- https://cert.be/en/advisory/warning-php-remote-code-execution-patch-immediatelyThird Party Advisory
- https://devco.re/blog/2024/06/06/security-alert-cve-2024-4577-php-cgi-argument-injection-vulnerability-en/Exploit, Third Party Advisory
- https://github.com/11whoami99/CVE-2024-4577Exploit
- https://github.com/php/php-src/security/advisories/GHSA-3qgc-jrrr-25jvExploit, Third Party Advisory
- https://github.com/rapid7/metasploit-framework/pull/19247Exploit, Issue Tracking, Patch
- https://github.com/watchtowrlabs/CVE-2024-4577Exploit, Third Party Advisory
- https://github.com/xcanwin/CVE-2024-4577-PHP-RCEExploit, Third Party Advisory
- https://isc.sans.edu/diary/30994Exploit, Third Party Advisory
- https://labs.watchtowr.com/no-way-php-strikes-again-cve-2024-4577/Exploit, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PKGTQUOA2NTZ3RXN22CSAUJPIRUYRB4B/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W45DBOH56NQDRTOM2DN2LNA2FZIMC3PK/Mailing List
- https://security.netapp.com/advisory/ntap-20240621-0008/Third Party Advisory
- https://www.imperva.com/blog/imperva-protects-against-critical-php-vulnerability-cve-2024-4577/Third Party Advisory
- https://www.php.net/ChangeLog-8.php#8.1.29Release Notes
- https://www.php.net/ChangeLog-8.php#8.2.20Release Notes
- https://www.php.net/ChangeLog-8.php#8.3.8Release Notes
- http://www.openwall.com/lists/oss-security/2024/06/07/1Mailing List, Third Party Advisory
- https://arstechnica.com/security/2024/06/php-vulnerability-allows-attackers-to-run-malicious-code-on-windows-servers/Exploit, Press/Media Coverage, Third Party Advisory
- https://blog.orange.tw/2024/06/cve-2024-4577-yet-another-php-rce.htmlThird Party Advisory
- https://blog.talosintelligence.com/new-persistent-attacks-japan/Exploit, Third Party Advisory
- https://cert.be/en/advisory/warning-php-remote-code-execution-patch-immediatelyThird Party Advisory
- https://devco.re/blog/2024/06/06/security-alert-cve-2024-4577-php-cgi-argument-injection-vulnerability-en/Exploit, Third Party Advisory
- https://github.com/11whoami99/CVE-2024-4577Exploit
- https://github.com/php/php-src/security/advisories/GHSA-3qgc-jrrr-25jvExploit, Third Party Advisory
- https://github.com/rapid7/metasploit-framework/pull/19247Exploit, Issue Tracking, Patch
- https://github.com/watchtowrlabs/CVE-2024-4577Exploit, Third Party Advisory
- https://github.com/xcanwin/CVE-2024-4577-PHP-RCEExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.