CVSS: 8.6EPSS: 0%CPEs: 4EXPL: 0CVE-2021-32779 – Incorrectly handling of URI '#fragment' element as part of the path element
https://notcve.org/view.php?id=CVE-2021-32779
24 Aug 2021 — Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions envoy incorrectly handled a URI '#fragment' element as part of the path element. Envoy is configured with an RBAC filter for authorization or similar mechanism with an explicit case of a final "/admin" path element, or is using a negative assertion with final path element of "/admin". The client sends request to "/app1/admin#foo". In Envoy prior to 1.18.0, or 1.18.0+ configur... • https://github.com/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9 • CWE-551: Incorrect Behavior Order: Authorization Before Parsing and Canonicalization CWE-697: Incorrect Comparison CWE-863: Incorrect Authorization •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0CVE-2021-32778 – Excessive CPU utilization when closing HTTP/2 streams
https://notcve.org/view.php?id=CVE-2021-32778
24 Aug 2021 — Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions envoy’s procedure for resetting a HTTP/2 stream has O(N^2) complexity, leading to high CPU utilization when a large number of streams are reset. Deployments are susceptible to Denial of Service when Envoy is configured with high limit on H/2 concurrent streams. An attacker wishing to exploit this vulnerability would require a client opening and closing a large number of H/2 s... • https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc • CWE-834: Excessive Iteration •
CVSS: 8.6EPSS: 0%CPEs: 4EXPL: 0CVE-2021-32777 – Incorrect concatenation of multiple value request headers in ext-authz extension
https://notcve.org/view.php?id=CVE-2021-32777
24 Aug 2021 — Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions when ext-authz extension is sending request headers to the external authorization service it must merge multiple value headers according to the HTTP spec. However, only the last header value is sent. This may allow specifically crafted requests to bypass authorization. Attackers may be able to escalate privileges when using ext-authz extension or back end service that uses mu... • https://github.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h • CWE-551: Incorrect Behavior Order: Authorization Before Parsing and Canonicalization CWE-863: Incorrect Authorization •
CVSS: 8.3EPSS: 7%CPEs: 4EXPL: 0CVE-2021-29492 – Bypass of path matching rules using escaped slash characters
https://notcve.org/view.php?id=CVE-2021-29492
12 May 2021 — 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 R... • https://github.com/envoyproxy/envoy/security/advisories/GHSA-4987-27fx-x6cf • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE-863: Incorrect Authorization •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0CVE-2021-29258 – envoyproxy/envoy: crash with empty HTTP/2 metadata map
https://notcve.org/view.php?id=CVE-2021-29258
22 Apr 2021 — An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion. Se detectó un problema en Envoy versión 1.14.0. Se presenta un bloqueo explotable remoto para unos metadatos HTTP2, porque un mapa de METADATOS vacío desencadena un Reachable Assertion A flaw was found in envoyproxy. An attacker, able to craft an HTTP2 request that specifies an empty metadata map, can crash envoy resulting in a denial of servic... • https://blog.envoyproxy.io • CWE-476: NULL Pointer Dereference CWE-617: Reachable Assertion •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 1CVE-2021-28682 – envoyproxy/envoy: integer overflow handling large grpc-timeouts
https://notcve.org/view.php?id=CVE-2021-28682
22 Apr 2021 — An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable integer overflow in which a very large grpc-timeout value leads to unexpected timeout calculations. Se detectó un problema en Envoy versiones hasta 1.71.1. presenta un desbordamiento de enteros explotable remoto en el que un valor de grpc-timeout muy grande conlleva a cálculos de tiempo de espera inesperados A flaw was found in envoyproxy/envoy. An attacker, able to craft a packet which specifies a large grpc-timeout, can ... • https://blog.envoyproxy.io • CWE-190: Integer Overflow or Wraparound •
CVSS: 7.5EPSS: 0%CPEs: 2EXPL: 0CVE-2021-28683 – envoyproxy/envoy: NULL pointer dereference in TLS alert code handling
https://notcve.org/view.php?id=CVE-2021-28683
22 Apr 2021 — An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received. Se detectó un problema en Envoy versiones hasta 1.71.1. Se presenta una desreferencia de puntero NULL explotable remoto y bloqueo en TLS cuando es recibido un código de alerta TLS desconocido A NULL pointer dereference vulnerability was found envoyproxy/envoy. This flaw allows an attacker to establish a TLS session that sends an invalid T... • https://blog.envoyproxy.io • CWE-476: NULL Pointer Dereference •
CVSS: 8.2EPSS: 0%CPEs: 1EXPL: 0CVE-2021-21378 – JWT authentication bypass with unknown issuer token
https://notcve.org/view.php?id=CVE-2021-21378
11 Mar 2021 — Envoy is a cloud-native high-performance edge/middle/service proxy. In Envoy version 1.17.0 an attacker can bypass authentication by presenting a JWT token with an issuer that is not in the provider list when Envoy's JWT Authentication filter is configured with the `allow_missing` requirement under `requires_any` due to a mistake in implementation. Envoy's JWT Authentication filter can be configured with the `allow_missing` requirement that will be satisfied if JWT is missing (JwtMissed error) and fail if J... • https://github.com/envoyproxy/envoy/commit/ea39e3cba652bcc4b11bb0d5c62b017e584d2e5a • CWE-287: Improper Authentication CWE-303: Incorrect Implementation of Authentication Algorithm •
CVSS: 8.8EPSS: 0%CPEs: 1EXPL: 0CVE-2020-35470
https://notcve.org/view.php?id=CVE-2020-35470
15 Dec 2020 — 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 •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 1CVE-2020-35471
https://notcve.org/view.php?id=CVE-2020-35471
15 Dec 2020 — 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 •