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CVE-2023-27491

Date: April 4, 2023

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.

Language: C++

Severity Score

Related Resources (6)

https://datatracker.ietf.org/doc/html/rfc9113#section-8.3
https://www.rfc-editor.org/rfc/rfc9110#section-5.6.2
https://github.com/envoyproxy/envoy/security/advisories/GHSA-5jmv-cw9p-f9rp
https://datatracker.ietf.org/doc/html/rfc9114#section-4.3.1
https://nvd.nist.gov/vuln/detail/CVE-2023-27491
https://www.mend.io/vulnerability-database/CVE-2023-27491

Severity Score

Weakness Type (CWE)

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CWE-444

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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