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CVE-2019-11043

Underflow in PHP-FPM can lead to RCE

Published: Oct 28, 2019Updated: Nov 3, 2025 Sources: CVE List NVD BDU csafCWE-120
8.7HIGH
NVD MITRE
EPSS Score
99.4%
Top 0.1%
CISA KEV
Active Exploitation
Since Mar 25, 2022
Exploits
1 Known
Remediation
Patch Available
Self-Check
Nuclei · OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:CC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-120CWE-787

Affected Products

Red Hat Inc.
commercial·USaka redhat, red hat
software collectionsOn-prem
Operating Systems / linux-distro
Red Hat Enterprise LinuxOn-premOS
Operating Systems / linux-distro
enterprise linux eus compute nodeOn-prem
Operating Systems / linux-distro
enterprise linux for arm 64On-prem
Operating Systems / linux-distro
enterprise linux for arm 64 eusOn-prem
Operating Systems / linux-distro
enterprise linux for ibm z systemsOn-prem
Operating Systems / linux-distro
enterprise linux for ibm z systems eusOn-prem
Operating Systems / linux-distro
enterprise linux for power big endianOn-prem
Operating Systems / linux-distro
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
Astra Linux Special Edition для «Эльбрус»On-premOS
Operating Systems / linux-distro
PHP
oss-project·USaka pecl, pear, php language
PHPDev Tool
OSS Libraries / generic-library
Canonical Ltd.
commercial·GBaka canonical
UbuntuOn-premOS
Operating Systems / linux-distro
debian
oss-project·GBaka debian gnu/linux
debian linuxOn-premOS
Operating Systems / linux-distro
fedoraproject
oss-project·USaka fedora project
fedoraOn-premOS
Operating Systems / linux-distro
and 20 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Mar 25, 2022
Remediation due:Apr 15, 2022
Ransomware:Known ransomware use

Required action: Apply updates per vendor instructions.

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://github.com/neex/phuip-fpizdam
github.com
https://bugs.php.net/bug.php?id=78599
bugs.php.net
https://usn.ubuntu.com/4166-1/
usn.ubuntu.com
and 475 more references View all →

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