CISA KEV · Known exploitedCritical

CVE-2024-4577

PHP Group PHP

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: 9.8
EPSS: 100.0%
CISA KEV: Listed
Published: 2024.06.10

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability100.0%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: PHP Group PHP
Affected versions: 8.1.*, 8.2.*, 8.3.*, 8.1.0, 8.2.0, 8.3.0, >= 8.1.0 < 8.1.29, >= 8.2.0 < 8.2.20, >= 8.3.0 < 8.3.8, 39, 40
Fixed versions: 8.1.29, 8.2.20, 8.3.8

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

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

Due date: 2024.07.03

1
Identify
Confirm that PHP Group PHP and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-78
KEV added: 2024.06.12
Ransomware use: 확인됨