CVSS: 7.4EPSS: 0%CPEs: 1EXPL: 0CVE-2022-21656 – X.509 subjectAltName matching bypass in Envoy
https://notcve.org/view.php?id=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. • https://github.com/envoyproxy/envoy/commit/bb95af848c939cfe5b5ee33c5b1770558077e64e https://github.com/envoyproxy/envoy/security/advisories/GHSA-c9g7-xwcv-pjx2 • CWE-295: Improper Certificate Validation CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') •
CVSS: 6.5EPSS: 0%CPEs: 2EXPL: 0CVE-2022-23606 – Crash when a cluster is deleted in Envoy
https://notcve.org/view.php?id=CVE-2022-23606
Envoy is an open source edge and service proxy, designed for cloud-native applications. When a cluster is deleted via Cluster Discovery Service (CDS) all idle connections established to endpoints in that cluster are disconnected. A recursion was introduced in the procedure of disconnecting idle connections that can lead to stack exhaustion and abnormal process termination when a cluster has a large number of idle connections. This infinite recursion causes Envoy to crash. Users are advised to upgrade. • https://github.com/envoyproxy/envoy/commit/4b6dd3b53cd5c6d4d4df378a2fc62c1707522b31 https://github.com/envoyproxy/envoy/security/advisories/GHSA-9vp2-4cp7-vvxf https://access.redhat.com/security/cve/CVE-2022-23606 https://bugzilla.redhat.com/show_bug.cgi?id=2050758 • CWE-674: Uncontrolled Recursion CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0CVE-2021-43824 – Null pointer dereference in envoy
https://notcve.org/view.php?id=CVE-2021-43824
Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade. • https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p https://access.redhat.com/security/cve/CVE-2021-43824 https://bugzilla.redhat.com/show_bug.cgi?id=2050744 • CWE-476: NULL Pointer Dereference •