`CVE-2019-11043` PHP

Affected software	PHP
Severity	9.8 Critical CVSS 3.1 3 scores
Weakness	Out-of-bounds write (CWE-787)
Published	28 Oct 2019
Updated	17 Jun 2026

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.

CWE-120

Exploitation status

Exploited

Confirmed real-world exploitation.

CISA KEV listed Confirmed exploitation in the wild. Added 2022-03-25 · remediation due 2022-04-15 · ransomware use: known
VulnCheck KEV listed Exploitation reported in the wild. 12 citations · honeypot sightings · 21 exploits · earliest 2019-12-24.
CISA Vulnrichment exploitation: active CISA records active exploitation. Automatable: no, technical impact: total.
Indexed PoC 29 indexed Published artifacts you can open, in Exploit-DB, GitHub PoC, Metasploit, Nuclei; first seen 2019-09-23.
EPSS 99.8% chance in 30 days A model's forecast, not a report of exploitation. Higher than 99.9% of all scored CVEs.

VulnCheck KEV

Exploitation evidence from VulnCheck Known Exploited Vulnerabilities (VulnCheck KEV), used under VulnCheck's community terms. View CVE-2019-11043 in VulnCheck (free account), which lists 7 more citations and 16 more exploit references not shown here.

Evidence	Source	Detail	Date
Honeypot sighting	Shadowserver honeypots	Exploitation attempts seen on 1 day	2024-01-13
Honeypot sighting	VulnCheck canaries	Exploitation attempts seen on 3 days	2026-11-10 to 2026-11-13
Reported exploitation	f5.com	/labs/articles/threat-intelligence/vulnerabilities-exploits-and-malware-driving-attack-campaigns-in-november-2019	2019-12-24
Reported exploitation	f5.com	/labs/articles/threat-intelligence/vulnerabilities--exploits--and-malware-driving-attack-campaigns-in-december-2019	2020-01-31
Reported exploitation	cisa.gov	/sites/default/files/feeds/known_exploited_vulnerabilities.json	2022-03-25
Reported exploitation	thedfirreport.com	/2023/12/18/lets-opendir-some-presents-an-analysis-of-a-persistent-actors-activity	2023-12-18
Reported exploitation	go.recordedfuture.com	/hubfs/reports/cta-2024-0208.pdf	2024-02-08
Exploit reference	VulnCheck XDB 095460149708	Exploit type: initial-access	2019-09-23
Exploit reference	VulnCheck XDB 3430044ed268	Exploit type: infoleak	2019-10-23
Exploit reference	VulnCheck XDB 5d7564d7c174	Exploit type: initial-access	2019-10-28
Exploit reference	VulnCheck XDB b77e1a4b74e5	Exploit type: initial-access	2019-10-28
Exploit reference	VulnCheck XDB 7661c1eea5ee	Exploit type: initial-access	2019-10-29

Evidence

Source

Detail

Date

Honeypot sighting

Shadowserver honeypots

Exploitation attempts seen on 1 day

2024-01-13

Honeypot sighting

VulnCheck canaries

Exploitation attempts seen on 3 days

2026-11-10 to 2026-11-13

Reported exploitation

f5.com

/labs/articles/threat-intelligence/vulnerabilities-exploits-and-malware-driving-attack-campaigns-in-november-2019

2019-12-24

Reported exploitation

f5.com

/labs/articles/threat-intelligence/vulnerabilities--exploits--and-malware-driving-attack-campaigns-in-december-2019

2020-01-31

Reported exploitation

cisa.gov

/sites/default/files/feeds/known_exploited_vulnerabilities.json

2022-03-25

Reported exploitation

thedfirreport.com

/2023/12/18/lets-opendir-some-presents-an-analysis-of-a-persistent-actors-activity

2023-12-18

Reported exploitation

go.recordedfuture.com

/hubfs/reports/cta-2024-0208.pdf

2024-02-08

Exploit reference

VulnCheck XDB 095460149708

Exploit type: initial-access

2019-09-23

Exploit reference

VulnCheck XDB 3430044ed268

Exploit type: infoleak

2019-10-23

Exploit reference

VulnCheck XDB 5d7564d7c174

Exploit type: initial-access

2019-10-28

Exploit reference

VulnCheck XDB b77e1a4b74e5

Exploit type: initial-access

2019-10-28

Exploit reference

VulnCheck XDB 7661c1eea5ee

Exploit type: initial-access

2019-10-29

Index	Artifact	Stars	First seen
GitHub PoC	Exploit for CVE-2019-11043	1,837	2019-09-23
Nuclei	PHP-FPM Path Info Buffer Underflow - Remote Code Execution
Exploit-DB	PHP-FPM - Underflow Remote Code Execution (Metasploit)		2020-03-09
Metasploit	PHP-FPM Underflow RCE (normal rank)
GitHub PoC	(PoC) Python version of CVE-2019-11043 exploit by neex	147	2019-10-28
Exploit-DB	PHP-FPM + Nginx - Remote Code Execution		2019-10-28
GitHub PoC	php-fpm+Nginx RCE	105	2019-10-23
GitHub PoC	akamajoris/CVE-2019-11043-Docker	27	2019-10-24
GitHub PoC	Ladon POC Moudle CVE-2019-11043 (PHP-FPM + Ngnix)	16	2019-11-11
GitHub PoC	This repository provides a dockerized infrastructure and a python implementation of the CVE-2019-11043 exploit.	14	2020-05-05

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

Protection none
Action not pursued none
Review human Researcher
Record active

Decided by	Manual classification of this CVE in the legacy dataset
Finding	A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

Decided by

Manual classification of this CVE in the legacy dataset

Finding

A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

9.8 CRITICAL v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 3 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

Version Score Band Vector Assigner Type

CVSS 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H NVD Primary published

CVSS 3.1 8.7 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N security@php.net Secondary

CVSS 2.0 7.5 none AV:N/AC:L/Au:N/C:P/I:P/A:P NVD Primary

Version	Score	Band	Vector	Assigner	Type
CVSS 3.1	9.8	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`	NVD	Primary	published
CVSS 3.1	8.7	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N`	security@php.net	Secondary
CVSS 2.0	7.5	none	`AV:N/AC:L/Au:N/C:P/I:P/A:P`	NVD	Primary

Affected software and releases

Products and versions

23 products, 66 version entries

Source	Vendor	Product	Scheme	Affected versions
nvd	canonical	ubuntu linux	generic	12.04 · 14.04 · 16.04 · 18.04 · 19.04 · 19.10
nvd	debian	debian linux	generic	9.0 · 10.0
nvd	fedoraproject	fedora	generic	29 · 30 · 31
nvd	php	php	generic	≥ 7.1.0 and ＜ 7.1.33 · ≥ 7.2.0 and ＜ 7.2.24 · ≥ 7.3.0 and ＜ 7.3.11
nvd	redhat	enterprise linux	generic	8.0
nvd	redhat	enterprise linux desktop	generic	6.0 · 7.0
nvd	redhat	enterprise linux eus	generic	7.7 · 8.1 · 8.2 · 8.4 · 8.6 · 8.8
nvd	redhat	enterprise linux eus compute node	generic	7.7
nvd	redhat	enterprise linux for arm 64	generic	8.0_aarch64
nvd	redhat	enterprise linux for arm 64 eus	generic	8.1_aarch64 · 8.2_aarch64 · 8.4_aarch64 · 8.6_aarch64 · 8.8_aarch64
nvd	redhat	enterprise linux for ibm z systems	generic	6.0_s390x · 7.0_s390x · 8.0_s390x
nvd	redhat	enterprise linux for ibm z systems eus	generic	7.7_s390x · 8.1_s390x · 8.2_s390x · 8.4_s390x · 8.6_s390x · 8.8_s390x
nvd	redhat	enterprise linux for power big endian	generic	6.0_ppc64 · 7.0_ppc64
nvd	redhat	enterprise linux for power big endian eus	generic	7.7_ppc64
nvd	redhat	enterprise linux for power little endian	generic	7.0_ppc64le · 8.0_ppc64le
nvd	redhat	enterprise linux for power little endian eus	generic	7.7_ppc64le · 8.1_ppc64le · 8.2_ppc64le · 8.4_ppc64le · 8.6_ppc64le · 8.8_ppc64le
nvd	redhat	enterprise linux for scientific computing	generic	7.0
nvd	redhat	enterprise linux server	generic	6.0 · 7.0
nvd	redhat	enterprise linux server aus	generic	7.7 · 8.2 · 8.4 · 8.6
nvd	redhat	enterprise linux server tus	generic	7.7 · 8.2 · 8.4 · 8.6 · 8.8
nvd	redhat	enterprise linux workstation	generic	6.0 · 7.0
nvd	redhat	software collections	generic	1.0
nvd	tenable	tenable.sc	generic	＜ 5.19.0

Source

Vendor

Product

Scheme

Affected versions

nvd

canonical

ubuntu linux

generic

12.04 · 14.04 · 16.04 · 18.04 · 19.04 · 19.10

nvd

debian

debian linux

generic

9.0 · 10.0

nvd

fedoraproject

fedora

generic

29 · 30 · 31

nvd

php

generic

≥ 7.1.0 and ＜ 7.1.33 · ≥ 7.2.0 and ＜ 7.2.24 · ≥ 7.3.0 and ＜ 7.3.11

nvd

redhat

enterprise linux

generic

8.0

nvd

redhat

enterprise linux desktop

generic

6.0 · 7.0

nvd

redhat

enterprise linux eus

generic

7.7 · 8.1 · 8.2 · 8.4 · 8.6 · 8.8

nvd

redhat

enterprise linux eus compute node

generic

7.7

nvd

redhat

enterprise linux for arm 64

generic

8.0_aarch64

nvd

redhat

enterprise linux for arm 64 eus

generic

8.1_aarch64 · 8.2_aarch64 · 8.4_aarch64 · 8.6_aarch64 · 8.8_aarch64

nvd

redhat

enterprise linux for ibm z systems

generic

6.0_s390x · 7.0_s390x · 8.0_s390x

nvd

redhat

enterprise linux for ibm z systems eus

generic

7.7_s390x · 8.1_s390x · 8.2_s390x · 8.4_s390x · 8.6_s390x · 8.8_s390x

nvd

redhat

enterprise linux for power big endian

generic

6.0_ppc64 · 7.0_ppc64

nvd

redhat

enterprise linux for power big endian eus

generic

7.7_ppc64

nvd

redhat

enterprise linux for power little endian

generic

7.0_ppc64le · 8.0_ppc64le

nvd

redhat

enterprise linux for power little endian eus

generic

7.7_ppc64le · 8.1_ppc64le · 8.2_ppc64le · 8.4_ppc64le · 8.6_ppc64le · 8.8_ppc64le

nvd

redhat

enterprise linux for scientific computing

generic

7.0

nvd

redhat

enterprise linux server

generic

6.0 · 7.0

nvd

redhat

enterprise linux server aus

generic

7.7 · 8.2 · 8.4 · 8.6

nvd

redhat

enterprise linux server tus

generic

7.7 · 8.2 · 8.4 · 8.6 · 8.8

nvd

redhat

enterprise linux workstation

generic

6.0 · 7.0

nvd

redhat

software collections

generic

1.0

nvd

tenable

tenable.sc

generic

＜ 5.19.0

Earlier manual review

A reviewer classified this CVE in an older dataset. We kept the labels and products below, but not the reviewer's reasoning.

## Manual Classification Context **Products:** PHP

References

URL	Tags
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00011.html	Mailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00014.html	Mailing List, Third Party Advisory
http://packetstormsecurity.com/files/156642/PHP-FPM-7.x-Remote-Code-Execution.html	Exploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Jan/40	Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3286	Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3287	Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3299	Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3300	Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3724	Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3735	Third Party Advisory

URL

Timeline

Published	2019-10-28	By the CVE Program.
VulnCheck KEV: earliest evidence	2019-12-24	Date of the oldest evidence of exploitation in VulnCheck KEV's record. VulnCheck does not publish the date it listed the CVE.
Added to CISA KEV	2022-03-25	Listed in CISA's Known Exploited Vulnerabilities catalog.
NVD record modified	2026-06-17	NVD's own last-modified date for this record.
VulnCheck KEV: latest evidence	2026-11-13	Date of the newest report, exploit reference or honeypot sighting in VulnCheck KEV's record.

Published

2019-10-28

By the CVE Program.

VulnCheck KEV: earliest evidence

2019-12-24

Date of the oldest evidence of exploitation in VulnCheck KEV's record. VulnCheck does not publish the date it listed the CVE.

Added to CISA KEV

2022-03-25

Listed in CISA's Known Exploited Vulnerabilities catalog.

NVD record modified

2026-06-17

NVD's own last-modified date for this record.

VulnCheck KEV: latest evidence

2026-11-13

Date of the newest report, exploit reference or honeypot sighting in VulnCheck KEV's record.

How VRT decided (5 of 24 rules ran)

5 of 24 rules ran. The rest didn't run because an earlier rule had already settled the CVE.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? the first rule that matches decides

1 rejected no match CVE Program withdrawal of this identifier

scope: Is it a vulnerability Waratek protects? the first rule that matches decides

2 armr-patch-file no match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no match An ARMR security-rule template on disk for this CVE

4 manual-classification no match A researcher's recorded decision for this specific CVE

5 manual classification decided it matched Outside Waratek scope Found in legacy manual classifications

6 non-java-upstream not reached A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component not reached The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the JInitiator browser plug-in, the native WebLogic proxy plug-in, or a native part of Oracle Application Server or Collaboration Suite (HTTP Server, Web Cache, Internet Directory, mail and calendar servers). Oracle gives these no CPE of their own and names them only in the description.

8 java-client-side not reached Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed

9 osv-maven not reached An OSV.dev record of this CVE affecting a package published to Maven Central. When every such package is one business applications do not use (Minecraft mods and launchers, Fastjson) and no tracked product is named by CPE, it settles the CVE as Outside Waratek scope instead

10 cna-maven-package not reached An affected Maven artifact named by the CNA itself

11 known-cpe-product not reached An NVD CPE naming a product ARMR tracks

12 cna-cpe-product not reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

13 oracle-advisory-family not reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

14 cna-named-product not reached A tracked product named in words by the CVE's own CNA, on a record with no CPE yet. Apache and Eclipse publish these on advisory day, before NVD adds CPE data.

15 non-deployable-product not reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

16 unmatched-product not reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? every rule runs

17 patch-hint not reached A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug

18 open-source-maven not reached The affected package being open source on Maven, so the fix can be read

19 poc-derivable not reached An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit not reached Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read

21 secure-rule-match not reached A vulnerability class already blocked by an ARMR security rule

22 exploited-no-fix-or-poc not reached Somebody exploiting this CVE (a CISA or VulnCheck KEV listing, or a CISA verdict of active exploitation), with no fix, source code or PoC to build a rule from

23 below-action-threshold not reached Medium or Low severity, no CISA or VulnCheck KEV listing, no PoC clearing the evidence bar, no CISA verdict, no Oracle advisory

24 no-exploit-published not reached Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all

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