PHP parses encoded cookie names so malicious `__Host-` cookies can be sent (PHP Group PHP)
At a glance
- Source
- NVD
- EPSS
- EPSS 5.03 % · percentile 92 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- php
- NVD status
- Modified
Description
In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when PHP is processing incoming HTTP cookie values, the cookie names are url-decoded. This may lead to cookies with prefixes like __Host confused with cookies that decode to such prefix, thus leading to an attacker being able to forge cookie which is supposed to be secure. See also CVE-2020-8184 for more information.
Weaknesses (CWE)
- CWE-20 — Improper Input Validation
- CWE-565 — Reliance on Cookies without Validation and Integrity Checking
References
- https://hackerone.com/reports/895727
- https://bugs.php.net/bug.php?id=79699
- http://cve.circl.lu/cve/CVE-2020-8184
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RRU57N3OSYZPOMFWPRDNVH7EMYOTSZ66/
- https://lists.debian.org/debian-lts-announce/2020/10/msg00008.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EVDN7D3IB4EAI4D3ZOM2OJKQ5SD7K4E/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2J3ZZDHCSX65T5QWV4AHBN7MOJXBEKG/
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00045.html
- https://usn.ubuntu.com/4583-1/
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00067.html
- https://security.gentoo.org/glsa/202012-16
- https://www.debian.org/security/2021/dsa-4856
- https://security.netapp.com/advisory/ntap-20201016-0001/
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.tenable.com/security/tns-2021-14
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N | php |
| CVSS 3.1 | MEDIUM 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N | NVD · security@php.net (Secondary) |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2020-28204
- GCVE · GCVE-0-2020-7070
CERT-FR advisories
- CERTFR-2021-AVI-571 — Multiples vulnérabilités dans Tenable · cert.ssi.gouv.fr
- CERTFR-2020-AVI-615 — Multiples vulnérabilités dans PHP · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*≥ 7.2.0 < 7.2.34cpe:2.3:a:php:php:*:*:*:*:*:*:*:*≥ 7.3.0 < 7.3.23cpe:2.3:a:php:php:*:*:*:*:*:*:*:*≥ 7.4.0 < 7.4.11cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*< 5.19.0
Affected products
| Product | Versions |
|---|---|
| PHP Group · PHP | affected 7.3.x < 7.3.23 ; affected 7.4.x < 7.4.11 ; affected 7.2.x < 7.2.34 |
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 |