What is CVE-2019-11043?

CVE-2019-11043 is a high-severity vulnerability in Php, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.7/10. Published 2019-10-28.

How severe is CVE-2019-11043?

High severity. CVSS v3 base score is 8.7 out of 10.

Is CVE-2019-11043 known to be exploited?

Yes. CVE-2019-11043 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating it is being actively exploited. 147 public proof-of-concept repositories are indexed.

Buffer overflow in Php

CVE-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 op…

Vulnerability class: Buffer Overflow

EPSS: 0.941 (99.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N.

Affected products

Php — versions 7.1.x, 7.2.x, 7.3.x

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-03-25. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-04-15.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

github.com/neex/phuip-fpizdam (x_refsource_MISC)
bugs.php.net/bug.php (x_refsource_CONFIRM)
USN-4166-1 (vendor-advisory, x_refsource_UBUNTU)
DSA-4552 (vendor-advisory, x_refsource_DEBIAN)
DSA-4553 (vendor-advisory, x_refsource_DEBIAN)
USN-4166-2 (vendor-advisory, x_refsource_UBUNTU)
support.f5.com/csp/article/K75408500 (x_refsource_CONFIRM)
FEDORA-2019-4adc49a476 (vendor-advisory, x_refsource_FEDORA)
security.netapp.com/advisory/ntap-20191031-0003/ (x_refsource_CONFIRM)
RHSA-2019:3286 (vendor-advisory, x_refsource_REDHAT)

Frequently asked questions

What is CVE-2019-11043?: CVE-2019-11043 is a high-severity vulnerability in Php, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.7/10. Published 2019-10-28.
How severe is CVE-2019-11043?: High severity. CVSS v3 base score is 8.7 out of 10.
Is CVE-2019-11043 known to be exploited?: Yes. CVE-2019-11043 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating it is being actively exploited. 147 public proof-of-concept repositories are indexed.