CVE-2024-4577

CriticalActively exploited (CISA KEV)Known to be used in ransomware campaigns

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.

SeverityCritical
CVSS9.8
Exploit probability—
ProductPHP Group PHP
PublishedJun 9, 2024
First seenJun 9, 2024
Added to KEVJun 12, 2024

How to fix

CISA required action

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

CISA due date: Jul 3, 2024
Update
  • php php8.1.29, 8.2.20, 8.3.8 or later

Affected products

ProductAffected versionsFixed in
php php8.1.0 ≤ v < 8.1.29, 8.2.0 ≤ v < 8.2.20, 8.3.0 ≤ v < 8.3.88.1.29, 8.2.20, 8.3.8
fedoraproject fedora39, 40—

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