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Vulnerabilities

Vulnerability · CVE-2019-11043

PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability

Published Oct 28, 2019 · catalog updated Jun 16, 2026 · PHP FastCGI Process Manager (FPM)

Patch now

CVE-2019-11043 is in the CISA known-exploited catalog, due Apr 15, 2022. Confirm PHP FastCGI Process Manager (FPM) against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.75%
Remediation
Remediation guidance
Affected products
cpe canonical/ubuntu linux · cpe debian/debian linux · cpe fedoraproject/fedora · cpe php/php · cpe redhat/software collections · cpe tenable/tenable.sc

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe canonical/ubuntu linux12.04
  • cpe canonical/ubuntu linux14.04
  • cpe canonical/ubuntu linux16.04
  • cpe canonical/ubuntu linux18.04
  • cpe canonical/ubuntu linux19.04
  • cpe debian/debian linux9.0
  • cpe fedoraproject/fedora29
  • cpe php/phpversion unspecified
  • cpe redhat/software collections1.0
  • cpe tenable/tenable.scversion unspecified
  • vendor PHP FastCGI Process Manager (FPM)version unspecified

How to fix CVE-2019-11043

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2019-11043 is in the CISA known-exploited catalog, due Apr 15, 2022. Confirm PHP FastCGI Process Manager (FPM) against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with canonical/ubuntu linux 12.04; canonical/ubuntu linux 14.04; canonical/ubuntu linux 16.04; canonical/ubuntu linux 18.04. Apply updates per vendor instructions.

What should an analyst verify?

CWE-120: Classic Buffer Overflow; CWE-787: Out-of-bounds Write. EPSS 99.75%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 28, 2019 · Catalog

    Detected

    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.

  2. Mar 25, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Apr 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2019-11043

    In some versions of PHP in certain configurations of FPM setup, it is possible to cause FPM module to write past allocated buffers allowing the possibility of remote code execution.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2019-11043

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2019-11043

    30-day exploitation probability 99.7%

    first.org
  • Exploit DatabasePublic exploit reference47553

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Exploit DatabasePublic exploit reference48182

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_multi/http/php_fpm_rce

    Public module reference (normal). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2019-11043

    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 exec

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/156642/PHP-FPM-7.x-Remote-Code-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2019-11043

    In some versions of PHP in certain configurations of FPM setup, it is possible to cause FPM module to write past allocated buffers allowing the possibility of remote code execution.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.