CVE-2022-21656

Envoy is an open source edge and service proxy, designed for cloud-native applications. The default_validator.cc implementation used to implement the default certificate validation routines has a "type confusion" bug when processing subjectAltNames. This processing allows, for example, an rfc822Name or uniformResourceIndicator to be authenticated as a domain name. This confusion allows for the bypassing of nameConstraints, as processed by the underlying OpenSSL/BoringSSL implementation, exposing the possibility of impersonation of arbitrary servers. As a result Envoy will trust upstream certificates that should not be trusted.

CVSS v3 5.9 MEDIUM
CVSS v2.0 5.8 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:N

Exploitability : 8.6 / Impact : 4.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/envoyproxy/envoy/commit/bb95af848c939cfe5b5ee33c5b1770558077e64e	Patch Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-c9g7-xwcv-pjx2	Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2022-02-22 23:15

Updated : 2023-07-24 13:50

NVD link : CVE-2022-21656

Mitre link : CVE-2022-21656

CVE.ORG link : CVE-2022-21656

JSON object : View

Products Affected

envoyproxy

envoy

CWE

CWE-843

Access of Resource Using Incompatible Type ('Type Confusion')

CWE-295

Improper Certificate Validation

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