Published: 22/02/2022 Updated: 24/07/2023

CVSS v2 Base Score: 5.8 | Impact Score: 4.9 | Exploitability Score: 8.6

CVSS v3 Base Score: 5.9 | Impact Score: 3.6 | Exploitability Score: 2.2

VMScore: 517

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

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.

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Envoy is an open source edge and service proxy, designed for cloud-native applications The default_validatorcc implementation used to implement the default certificate validation routines has a &quot;type confusion&quot; bug when processing subjectAltNames This processing allows, for example, an rfc822Name or uniformResourceIndicator to ...

CWE-843 https://github.com/envoyproxy/envoy/commit/bb95af848c939cfe5b5ee33c5b1770558077e64e https://github.com/envoyproxy/envoy/security/advisories/GHSA-c9g7-xwcv-pjx2 https://nvd.nist.gov https://access.redhat.com/security/cve/cve-2022-21656

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CVE-2022-21656

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