CVE-2019-11043

Confirmed PUBLISHED

Underflow in PHP-FPM can lead to RCE

PHP · PHP

Exploited in the wild Used in malware PoC available

Recommended Action

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

View KEV Feed Talk to Sales

Confidence

Confirmed

Exploitation Status

Exploited in the wild

Observed in Sensors

Attempts (30d)

—

Unique Attacker IPs

—

CISA KEV

In CISA KEV

CVSS / EPSS

8.7 High

At a Glance

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.

php cisa malware metasploit ransomware

CVE Published: Oct 28, 2019
Exploitation Reported: Mar 25, 2022
CVSS: 8.7 High
EPSS: —

Remote No user interaction Unauthenticated

Affected Versions

Vendor	Product	Version	Status
PHP	PHP	7.1.x to < 7.1.33	Affected
PHP	PHP	7.2.x to < 7.2.24	Affected
PHP	PHP	7.3.x to < 7.3.11	Affected

CVE References

USN-4166-1 usn.ubuntu.com · Vendor Advisory https://usn.ubuntu.com/4166-1/
DSA-4552 debian.org · Vendor Advisory https://www.debian.org/security/2019/dsa-4552
DSA-4553 debian.org · Vendor Advisory https://www.debian.org/security/2019/dsa-4553
USN-4166-2 usn.ubuntu.com · Vendor Advisory https://usn.ubuntu.com/4166-2/
FEDORA-2019-4adc49a476 lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...

Show 22 more references

RHSA-2019:3286 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2019:3286
RHSA-2019:3287 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2019:3287
RHSA-2019:3299 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2019:3299
RHSA-2019:3300 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2019:3300
FEDORA-2019-187ae3128d lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
FEDORA-2019-7bb07c3b02 lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
openSUSE-SU-2019:2441 lists.opensuse.org · Vendor Advisory http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00011...
RHSA-2019:3724 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2019:3724
RHSA-2019:3735 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2019:3735
RHSA-2019:3736 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2019:3736
openSUSE-SU-2019:2457 lists.opensuse.org · Vendor Advisory http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00014...
RHSA-2020:0322 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2020:0322
20200129 APPLE-SA-2020-1-28-2 macOS Catalina 10.15.3, Security Update 2020-001 Mojave, Security Update 2020-001 High Sierra seclists.org · Mailing List https://seclists.org/bugtraq/2020/Jan/44
20200131 APPLE-SA-2020-1-28-2 macOS Catalina 10.15.3, Security Update 2020-001 Mojave, Security Update 2020-001 High Sierra seclists.org · Mailing List http://seclists.org/fulldisclosure/2020/Jan/40
GitHub — neex/phuip-fpizdam github.com · CVE Record https://github.com/neex/phuip-fpizdam
bugs.php.net/bug.php bugs.php.net · CVE Record https://bugs.php.net/bug.php?id=78599
support.f5.com/csp/article/K75408500 support.f5.com · CVE Record https://support.f5.com/csp/article/K75408500?utm_source=f5support&amp...
security.netapp.com/advisory/ntap-20191031-0003 security.netapp.com · CVE Record https://security.netapp.com/advisory/ntap-20191031-0003/
synology.com/security/advisory/Synology_SA_19_36 synology.com · CVE Record https://www.synology.com/security/advisory/Synology_SA_19_36
support.apple.com/kb/HT210919 support.apple.com · CVE Record https://support.apple.com/kb/HT210919
packetstormsecurity.com/files/156642/PHP-FPM-7.x-Remote-Code-Executi... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/156642/PHP-FPM-7.x-Remote-Code-E...
tenable.com/security/tns-2021-14 tenable.com · CVE Record https://www.tenable.com/security/tns-2021-14

Recommended Actions

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.

Known Exploited Vulnerability Sources

Catalogues that list this CVE as a known exploited vulnerability.

Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.

Learn about Pro API access

Source	Added
CISA First	2022-03-25 00:00 UTC

Scanner Artifacts

Nuclei and Metasploit references linked to this CVE.

Scanner	Reference	Detected
Metasploit	https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/php_fpm_rce.rb	Apr 28, 2025

CVSS Scores

CVSS v3.1 8.7 High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Exploitation Status

Exploited in the wild

Recorded 2022-03-25 00:00:00 UTC · CISA

Used in malware

Recorded 2022-03-25 00:00:00 UTC · CISA

Proof of concept available

Recorded 2019-10-23 13:32:14 UTC · GitHub

Weaknesses (CWE)

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Scanner Integrations

Scanner	Reference	Detected
Metasploit	https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/php_fpm_rce.rb	Apr 28, 2025

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

jas9reet/CVE-2019-11043

github · Created 2022-03-04 16:25:16 UTC · 0 stars

CVE-2019-11043 LAB

lindemer/CVE-2019-11043

github · Created 2020-11-18 07:25:37 UTC · 4 stars

PHP-FPM Remote Command Execution Exploit

corifeo/CVE-2019-11043

github · Created 2020-07-13 16:32:15 UTC · 0 stars

quick and dirty PHP RCE proof of concept

kriskhub/CVE-2019-11043

github · Created 2020-05-05 09:43:44 UTC · 12 stars

This repository provides a dockerized infrastructure and a python implementation of the CVE-2019-11043 exploit.

moniik/CVE-2019-11043_env

github · Created 2019-11-17 05:16:02 UTC · 1 stars

remote debug environment for CLion

k8gege/CVE-2019-11043

github · Created 2019-11-11 11:29:54 UTC · 16 stars

Ladon POC Moudle CVE-2019-11043 (PHP-FPM + Ngnix)

0th3rs-Security-Team/CVE-2019-11043

github · Created 2019-11-06 15:44:47 UTC · 13 stars

CVE-2019-11043 PHP7.x RCE

MRdoulestar/CVE-2019-11043

github · Created 2019-11-06 14:53:13 UTC · 3 stars

CVE-2019-11043 && PHP7.x && RCE EXP

ypereirareis/docker-CVE-2019-11043

github · Created 2019-10-30 10:22:41 UTC · 7 stars

Docker image and commands to check CVE-2019-11043 vulnerability on nginx/php-fpm applications.

huowen/CVE-2019-11043

github · Created 2019-10-29 11:16:12 UTC · 5 stars

Python exp for CVE-2019-11043

theMiddleBlue/CVE-2019-11043

github · Created 2019-10-28 11:09:06 UTC · 145 stars

(PoC) Python version of CVE-2019-11043 exploit by neex

akamajoris/CVE-2019-11043-Docker

github · Created 2019-10-24 12:32:02 UTC · 27 stars

fairyming/CVE-2019-11043

github · Created 2019-10-24 09:12:38 UTC · 1 stars

ianxtianxt/CVE-2019-11043

github · Created 2019-10-24 09:09:01 UTC · 0 stars

AleWong/PHP-FPM-Remote-Code-Execution-Vulnerability-CVE-2019-11043-

github · Created 2019-10-24 05:28:41 UTC · 4 stars

PHP-FPM Remote Code Execution Vulnerability (CVE-2019-11043) POC in Python

jas502n/CVE-2019-11043

github · Created 2019-10-23 23:26:57 UTC · 104 stars

php-fpm+Nginx RCE

tinker-li/CVE-2019-11043

github · Created 2019-10-23 13:34:28 UTC · 0 stars

B1gd0g/CVE-2019-11043

github · Created 2019-10-23 13:32:14 UTC · 0 stars

CVE-2019-11043

php_fpm_rce

metasploit · Created Unknown

Metasploit module for CVE-2019-11043

Automate This Intelligence with the Pro API

Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

View Pro Pricing View API Docs

Pro API Example

GET /api/v2/pro/kevs/CVE-2019-11043

{
  "cve_id": "CVE-2019-11043",
  "title": "Underflow in PHP-FPM can lead to RCE",
  "affected_vendor": "PHP",
  "affected_product": "PHP",
  "affected_versions": [
    { "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
  ],
  "confidence": "Confirmed",
  "cvss_score": 8.7,
  "epss_score": null,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "...": "Pro API fields" },
  "proof_of_concepts": [ "..." ],
  "scanner_integrations": [ "..." ]
}

The free JSON API returns basic KEV fields only. Confidence, telemetry, and artifact enrichment require Pro API access.

CVE-2019-11043

At a Glance

Affected Versions

CVE References

Recommended Actions

Known Exploited Vulnerability Sources

Scanner Artifacts

Virtual Patch

CVSS Scores

Exploitation Status

Weaknesses (CWE)

Scanner Integrations

Potential Proof of Concepts

Timeline

Automate This Intelligence with the Pro API