CVE-2019-11043
KEVRansomware UsePHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability
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.
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.
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:NPublishedOct 28, 2019
Last modifiedJun 17, 2026
Added to KEVMar 25, 2022
Remediation dueApr 15, 2022
References
- lists.opensuse.org/opensuse-security-announce/2019-11/msg00011.htmlMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-11/msg00014.htmlMailing ListThird Party Advisory
- packetstormsecurity.com/files/156642/PHP-FPM-7.x-Remote-Code-Execution.htmlExploitThird Party Advisory
- seclists.org/fulldisclosure/2020/Jan/40Mailing ListThird Party Advisory
- access.redhat.com/errata/RHSA-2019:3286Third Party Advisory
- access.redhat.com/errata/RHSA-2019:3287Third Party Advisory
- access.redhat.com/errata/RHSA-2019:3299Third Party Advisory
- access.redhat.com/errata/RHSA-2019:3300Third Party Advisory
- access.redhat.com/errata/RHSA-2019:3724Third Party Advisory
- access.redhat.com/errata/RHSA-2019:3735Third Party Advisory
- access.redhat.com/errata/RHSA-2019:3736Third Party Advisory
- access.redhat.com/errata/RHSA-2020:0322Third Party Advisory
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Risk assessment · Critical
Actively exploited and used by ransomware crews. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1657 days
- Ransomware
- Used in known ransomware campaigns
- CVSS
- 8.7 HIGH
- EPSS (30-day exploit probability)
- 99.7% · top 1% of all CVEs
- Weakness
- CWE-120
- Attack vector
- Network, remotely reachable
- Preconditions
- No privileges and no user interaction
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
- 5.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.