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…

PriorityP431medium5.9CVSS 3.1

AVNACHPRNUINSUCNIHAN

EPSS

0.77%

50.9th percentile

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.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
envoyproxy	envoy	< 1.20.2	1.20.2

CVSS provenance

nvdv3.15.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

nvdv2.05.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:N

vendor_redhat7.4HIGH

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