CVE-2021-32777

Katalog CVE

CVSS 8.3 · High EPSS 3,3%

Kerentanan Incorrect Behavior Order: Authorization Before Parsing and Canonicalization pada envoyproxy envoy. Skor CVSS 3.1 8.3 (High) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

24 Agustus 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

8.3 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-551: Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
CWE-863: Incorrect Authorization

EPSS (30 hari)

3,3% peluang dieksploitasi; lebih tinggi dari 88,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history release notes · advisory vendor
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h advisory pihak ketiga