CVE-2023-27491 — Improper Input Validation in Envoy

CWE-20 — Improper Input ValidationCWE-444 — HTTP Request Smuggling2 documents2 sources
Severity
9.1CRITICALNVD
EPSS
0.0%
top 96.72%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Envoyproxy Envoy
Timeline
PublishedApr 4

Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Compliant HTTP/1 service should reject malformed request lines. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, There is a possibility that non compliant HTTP/1 service may allow malformed requests, potentially leading to a bypass of security policies. This issue is fixed in versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NExploitability: 3.9 | Impact: 5.2

Affected Packages2 packages

▶NVDenvoyproxy/envoy1.23.0 — 1.23.6+3
▶CVEListV5envoyproxy/envoy>= 1.23.0, < 1.23.6, >= 1.24.0, < 1.24.4, >= 1.25.0, < 1.25.3+2

📋Vendor Advisories

1
Red Hat
envoy: Envoy forwards invalid HTTP/2 and HTTP/3 downstream↗2023-04-04
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CVE-2023-27491 — Improper Input Validation in Envoy | cvebase