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
09 Sep 2021 — 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 identi... • https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8 • CWE-754: Improper Check for Unusual or Exceptional Conditions •
CVSS: 8.6EPSS: 0%CPEs: 2EXPL: 0CVE-2021-32780 – Incorrect handling of H/2 GOAWAY followed by SETTINGS frames
https://notcve.org/view.php?id=CVE-2021-32780
24 Aug 2021 — Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions Envoy transitions a H/2 connection to the CLOSED state when it receives a GOAWAY frame without any streams outstanding. The connection state is transitioned to DRAINING when it receives a SETTING frame with the SETTINGS_MAX_CONCURRENT_STREAMS parameter set to 0. Receiving these two frames in the same I/O event results in abnormal termination of the Envoy process due to invali... • https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8 • CWE-754: Improper Check for Unusual or Exceptional Conditions •
CVSS: 8.6EPSS: 0%CPEs: 4EXPL: 0CVE-2021-32781 – Continued processing of requests after locally generated response
https://notcve.org/view.php?id=CVE-2021-32781
24 Aug 2021 — Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions after Envoy sends a locally generated response it must stop further processing of request or response data. However when local response is generated due the internal buffer overflow while request or response is processed by the filter chain the operation may not be stopped completely and result in accessing a freed memory block. A specifically constructed request delivered by... • https://github.com/envoyproxy/envoy/security/advisories/GHSA-5vhv-gp9v-42qv • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-416: Use After Free CWE-476: NULL Pointer Dereference •
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 •