CVSS: 7.5EPSS: 0%CPEs: 6EXPL: 0CVE-2021-39204 – Excessive CPU usage in Pomerium
https://notcve.org/view.php?id=CVE-2021-39204
Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, incorrectly handles resetting of HTTP/2 streams with excessive complexity. This can lead to high CPU utilization when a large number of streams are reset. This can result in a DoS condition. Pomerium versions 0.14.8 and 0.15.1 contain an upgraded envoy binary with this vulnerability patched. • https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc https://github.com/pomerium/pomerium/security/advisories/GHSA-5wjf-62hw-q78r https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ • CWE-834: Excessive Iteration •
CVSS: 8.6EPSS: 0%CPEs: 3EXPL: 0CVE-2021-39162 – Incorrect handling of H2 GOAWAY + SETTINGS frames
https://notcve.org/view.php?id=CVE-2021-39162
Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, can abnormally terminate if an H/2 GOAWAY and SETTINGS frame are received in the same IO event. This can lead to a DoS in the presence of untrusted *upstream* servers. 0.15.1 contains an upgraded envoy binary with this vulnerability patched. If only trusted upstreams are configured, there is not substantial risk of this condition being triggered. Pomerium es un proxy de acceso de código abierto consciente de la identidad. • https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8 https://github.com/pomerium/pomerium/security/advisories/GHSA-gjcg-vrxg-xmgv https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ • CWE-754: Improper Check for Unusual or Exceptional Conditions •
CVSS: 8.3EPSS: 0%CPEs: 4EXPL: 0CVE-2021-29492 – Bypass of path matching rules using escaped slash characters
https://notcve.org/view.php?id=CVE-2021-29492
Envoy is a cloud-native edge/middle/service proxy. Envoy does not decode escaped slash sequences `%2F` and `%5C` in HTTP URL paths in versions 1.18.2 and before. A remote attacker may craft a path with escaped slashes, e.g. `/something%2F..%2Fadmin`, to bypass access control, e.g. a block on `/admin`. A backend server could then decode slash sequences and normalize path and provide an attacker access beyond the scope provided for by the access control policy. ### Impact Escalation of Privileges when using RBAC or JWT filters with enforcement based on URL path. • https://github.com/envoyproxy/envoy/security/advisories/GHSA-4987-27fx-x6cf https://access.redhat.com/security/cve/CVE-2021-29492 https://bugzilla.redhat.com/show_bug.cgi?id=1951188 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE-863: Incorrect Authorization •
CVSS: 8.8EPSS: 0%CPEs: 1EXPL: 0CVE-2020-35470
https://notcve.org/view.php?id=CVE-2020-35470
Envoy before 1.16.1 logs an incorrect downstream address because it considers only the directly connected peer, not the information in the proxy protocol header. This affects situations with tcp-proxy as the network filter (not HTTP filters). Envoy versiones anteriores a 1.16.1, registra una dirección posterior incorrecta porque considera solo al peer conectado directamente, no la información en el encabezado proxy protocol. Esto afecta situaciones con tcp-proxy como filtro de red (no filtros HTTP) • https://github.com/envoyproxy/envoy/compare/v1.16.0...v1.16.1 https://github.com/envoyproxy/envoy/issues/14087 https://github.com/envoyproxy/envoy/pull/14131 •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 1CVE-2020-35471
https://notcve.org/view.php?id=CVE-2020-35471
Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500. Envoy versiones anteriores a 1.16.1, maneja inapropiadamente datagramas perdidos y truncados, como es demostrado por un fallo de segmentación para un tamaño de paquete UDP más largo que 1500 • https://github.com/envoyproxy/envoy/compare/v1.16.0...v1.16.1 https://github.com/envoyproxy/envoy/issues/14113 https://github.com/envoyproxy/envoy/pull/14122 •