Underflow in PHP-FPM can lead to RCE
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- Fix
- Fixed in 7.1.33, 7.2.24, 7.3.11
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The vulnerability affects PHP, specifically its PHP-FPM (FastCGI Process Manager) module, in certain server configurations. An attacker could exploit a memory write past allocated buffers to potentially execute arbitrary code remotely on the affected server.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it is possible to cause FPM module to write past allocated buffers into the space reserved for FCGI protocol data, thus opening the possibility of remote code execution.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- PHP PHP
From 7.1.x · fixed in 7.1.33; From 7.2.x · fixed in 7.2.24; From 7.3.x · fixed in 7.3.11