CVE-2023-35944

Envoy is an open source edge and service proxy designed for cloud-native applications. Envoy allows mixed-case schemes in HTTP/2, however, some internal scheme checks are case-sensitive. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, this can lead to the rejection of requests with mixed-case schemes such as `htTp` or `htTps`, or the bypassing of some requests such as `https` in unencrypted connections. With a fix in versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, Envoy will now lowercase scheme values by default, and change the internal scheme checks that were case-sensitive to be case-insensitive. There are no known workarounds for this issue.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/envoyproxy/envoy/security/advisories/GHSA-pvgm-7jpg-pw5g	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::

History

02 Aug 2023, 16:37

Type	Values Removed	Values Added
CPE		cpe:2.3:a:envoyproxy:envoy::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.3
References	~~(MISC) https://github.com/envoyproxy/envoy/security/advisories/GHSA-pvgm-7jpg-pw5g -~~	(MISC) https://github.com/envoyproxy/envoy/security/advisories/GHSA-pvgm-7jpg-pw5g - Exploit, Third Party Advisory
CWE	~~CWE-20~~	CWE-444
First Time		Envoyproxy envoy Envoyproxy

25 Jul 2023, 19:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-07-25 19:15

Updated : 2023-12-10 15:14

NVD link : CVE-2023-35944

Mitre link : CVE-2023-35944

CVE.ORG link : CVE-2023-35944

JSON object : View

Products Affected

envoyproxy

envoy

CWE

CWE-444

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

CWE-20

Improper Input Validation

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