PHP-FPM memory access in root process leading to privilege escalation (PHP Group PHP)
At a glance
- Source
- NVD
- EPSS
- EPSS 1.43 % · percentile 73 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- php
- NVD status
- Modified
Description
In PHP versions 7.3.x up to and including 7.3.31, 7.4.x below 7.4.25 and 8.0.x below 8.0.12, when running PHP FPM SAPI with main FPM daemon process running as root and child worker processes running as lower-privileged users, it is possible for the child processes to access memory shared with the main process and write to it, modifying it in a way that would cause the root process to conduct invalid memory reads and writes, which can be used to escalate privileges from local unprivileged user to the root user.
Weaknesses (CWE)
References
- https://bugs.php.net/bug.php?id=81026
- https://www.debian.org/security/2021/dsa-4992
- https://www.debian.org/security/2021/dsa-4993
- http://www.openwall.com/lists/oss-security/2021/10/26/7
- https://lists.debian.org/debian-lts-announce/2021/10/msg00021.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JO5RA6YOBGGGKLIA6F6BQRZDDECF5L3R/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PBM3KKB3RY2YPOKNMC4HIH7IH3T3WC74/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6PZVLICZUJMXOGWOUWSBAEGIVTF6Y6V3/
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://security.netapp.com/advisory/ntap-20211118-0003/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://security.gentoo.org/glsa/202209-20
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H | php |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · security@php.net (Secondary) |
| CVSS 3.1 | HIGH 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 6.9 | AV:L/AC:M/Au:N/C:C/I:C/A:C | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-8875
- GCVE · GCVE-0-2021-21703
CERT-FR advisories
- CERTFR-2023-AVI-0537 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
- CERTFR-2021-AVI-832 — Vulnérabilité dans PHP · cert.ssi.gouv.fr
- CERTFR-2021-AVI-815 — Vulnérabilité dans PHP · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*≥ 7.3.0 ≤ 7.3.31cpe:2.3:a:php:php:*:*:*:*:*:*:*:*≥ 7.4.0 < 7.4.25cpe:2.3:a:php:php:*:*:*:*:*:*:*:*≥ 8.0.0 < 8.0.12cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*≥ 8.0.0.0 ≤ 8.5.0.2
Affected products
| Product | Versions |
|---|---|
| PHP Group · PHP | affected 7.3.x ≤ 7.3.31 ; affected 7.4.x < 7.4.25 ; affected 8.0.X < 8.0.12 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |