CVE-2019-11043 (GCVE-0-2019-11043)

Vulnerability from cvelistv5 – Published: 2019-10-28 14:19 – Updated: 2025-10-21 23:45
VLAI CISA Shadowserver Previdian
Title
Underflow in PHP-FPM can lead to RCE
Summary
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.
Severity
8.7 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-07 13:08 UTC
CWE
Assigner
References
URL Tags
https://github.com/neex/phuip-fpizdam x_refsource_MISC
https://bugs.php.net/bug.php?id=78599 x_refsource_CONFIRM
https://usn.ubuntu.com/4166-1/ vendor-advisoryx_refsource_UBUNTU
https://www.debian.org/security/2019/dsa-4552 vendor-advisoryx_refsource_DEBIAN
https://www.debian.org/security/2019/dsa-4553 vendor-advisoryx_refsource_DEBIAN
https://usn.ubuntu.com/4166-2/ vendor-advisoryx_refsource_UBUNTU
https://support.f5.com/csp/article/K75408500?utm_… x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://security.netapp.com/advisory/ntap-2019103… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:3286 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3287 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3299 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3300 vendor-advisoryx_refsource_REDHAT
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://access.redhat.com/errata/RHSA-2019:3724 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3735 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3736 vendor-advisoryx_refsource_REDHAT
https://www.synology.com/security/advisory/Synolo… x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://support.apple.com/kb/HT210919 x_refsource_CONFIRM
https://seclists.org/bugtraq/2020/Jan/44 mailing-listx_refsource_BUGTRAQ
http://seclists.org/fulldisclosure/2020/Jan/40 mailing-listx_refsource_FULLDISC
https://access.redhat.com/errata/RHSA-2020:0322 vendor-advisoryx_refsource_REDHAT
http://packetstormsecurity.com/files/156642/PHP-F… x_refsource_MISC
https://www.tenable.com/security/tns-2021-14 x_refsource_CONFIRM
https://www.cisa.gov/known-exploited-vulnerabilit… government-resource
Impacted products
Vendor Product Version CPE status
PHP PHP Affected: 7.1.x , < 7.1.33 (custom)
Affected: 7.2.x , < 7.2.24 (custom)
Affected: 7.3.x , < 7.3.11 (custom)
guessed Create a notification for this product.
Date Public
2019-10-22 00:00
Credits
Reported by Emil Lerner.
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: e1fa3e09-5875-4799-bc9c-44c6605e8b52

Vulnerability ID: CVE-2019-11043

Status: Confirmed

Status Updated: 2022-03-25 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2022-03-25
Asserted: 2022-03-25
Scope
Notes: KEV entry: PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability | Affected: PHP / FastCGI Process Manager (FPM) | Description: 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. | Required action: Apply updates per vendor instructions. | Due date: 2022-04-15 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2019-11043
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-120
Feed CISA Known Exploited Vulnerabilities Catalog
Product FastCGI Process Manager (FPM)
Due Date 2022-04-15
Date Added 2022-03-25
Vendorproject PHP
Vulnerabilityname PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability
Knownransomwarecampaignuse Known
References
Created: 2026-02-02 12:28 UTC | Updated: 2026-02-06 07:17 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: cc7da80b-05f6-40b1-ad0e-a602e6ef74ff

Vulnerability ID: CVE-2019-11043

Status: Confirmed

Status Updated: 2024-01-13 18:52 UTC

Exploited: Yes

Characteristics
Severity: 98.0
Timestamps
First Seen: 2024-01-13
Asserted: 2024-01-13
Last Seen: 2024-01-13
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: PHP / PHP-FPM (FastCGI Process Manager) | Class: web-app-framework | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2023-06-18: 349
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 1
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class web-app-framework
7D Avg 0
Vendor PHP
30D Avg 0
90D Avg 0
Product PHP-FPM (FastCGI Process Manager)
Cisa Kev yes
Connections 349
Observation Date 2023-06-18
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical
References
Created: 2026-06-30 12:39 UTC | Updated: 2026-06-30 15:22 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: dddb9af9-bfda-4ef0-ab99-393aaf6b8d4f

Vulnerability ID: CVE-2019-11043

Status: Confirmed

Status Updated: 2022-03-25 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2022-03-25
Asserted: 2022-03-25
Scope
Notes: KEVIntel entry: Underflow in PHP-FPM can lead to RCE | Affected: PHP / PHP | CVSS: 8.7 (HIGH) | Used in malware: yes | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Confirmed Compromise

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Underflow in PHP-FPM can lead to RCE
Vendor PHP
Product PHP
Added Date 2022-03-25T00:00:00.000Z
Cvss Score 8.7
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware yes
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:05 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        },
        {
          "lang": "es",
          "value": "En PHP versiones 7.1.x anteriores a la versi\u00f3n  7.1.33, versiones 7.2.x anteriores a la versi\u00f3n 7.2.24 y versiones 7.3.x anteriores a 7.3.11, en ciertas configuraciones del FPM setup, es posible causar que el m\u00f3dulo FPM escriba m\u00e1s all\u00e1 de los b\u00faferes asignados en el espacio reservado para datos de protocolo FCGI, abriendo as\u00ed la posibilidad de ejecuci\u00f3n de c\u00f3digo remota."
        }
      ],
      "id": "CVE-2019-11043",
      "lastModified": "2024-11-21T04:20:26.040",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "HIGH",
            "cvssData": {
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              "accessVector": "NETWORK",
              "authentication": "NONE",
              "availabilityImpact": "PARTIAL",
              "baseScore": 7.5,
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              "integrityImpact": "PARTIAL",
              "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
              "version": "2.0"
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            "exploitabilityScore": 10.0,
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            "obtainAllPrivilege": false,
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            "obtainUserPrivilege": false,
            "source": "nvd@nist.gov",
            "type": "Primary",
            "userInteractionRequired": false
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        ],
        "cvssMetricV31": [
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              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 8.7,
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              "confidentialityImpact": "HIGH",
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              "privilegesRequired": "NONE",
              "scope": "CHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
              "version": "3.1"
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            "source": "security@php.net",
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              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
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              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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            "exploitabilityScore": 3.9,
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            "source": "nvd@nist.gov",
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      "published": "2019-10-28T15:15:13.863",
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            "value": "En PHP versiones 7.1.x anteriores a la versi\u00f3n  7.1.33, versiones 7.2.x anteriores a la versi\u00f3n 7.2.24 y versiones 7.3.x anteriores a 7.3.11, en ciertas configuraciones del FPM setup, es posible causar que el m\u00f3dulo FPM escriba m\u00e1s all\u00e1 de los b\u00faferes asignados en el espacio reservado para datos de protocolo FCGI, abriendo as\u00ed la posibilidad de ejecuci\u00f3n de c\u00f3digo remota."
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.