CVE-2021-32777
Incorrect concatenation of multiple value request headers in ext-authz extension
En bref
- Source
- NVD
- EPSS
- EPSS 3.33 % · centile 89 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- GitHub_M
- Statut NVD
- Modified
Description
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions when ext-authz extension is sending request headers to the external authorization service it must merge multiple value headers according to the HTTP spec. However, only the last header value is sent. This may allow specifically crafted requests to bypass authorization. Attackers may be able to escalate privileges when using ext-authz extension or back end service that uses multiple value headers for authorization. A specifically constructed request may be delivered by an untrusted downstream peer in the presence of ext-authz extension. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to the ext-authz extension to correctly merge multiple request header values, when sending request for authorization.
Faiblesses (CWE)
- CWE-551 — Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
- CWE-863 — Autorisation incorrecte
Références
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | GitHub_M |
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 8.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | HIGH 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P | NVD · nvd@nist.gov (Primary) |
Références européennes
- ENISA EUVD · EUVD-2021-19541
- GCVE · GCVE-0-2021-32777
Configurations affectées (CPE NVD)
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*≥ 1.16.0 < 1.16.5cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*≥ 1.17.0 < 1.17.4cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*≥ 1.18.0 < 1.18.4cpe:2.3:a:envoyproxy:envoy:1.19.0:*:*:*:*:*:*:*
Produits affectés
| Produit | Versions |
|---|---|
| envoyproxy · envoy | affected >= 1.19.0, < 1.19.1 ; affected >= 1.18.0, < 1.18.4 ; affected >= 1.17.0, < 1.17.4 ; affected >= 1.16.0, < 1.16.5 |
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 |
| 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 |