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
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 potentially cause envoy to incorrectly calculate the timeouts resulting in a denial of service. • https://blog.envoyproxy.io https://github.com/envoyproxy/envoy/blob/15e3b9dbcc9aaa9d391fa8033904aad1ea1ae70d/api/envoy/api/v2/cluster.proto#L36 https://github.com/envoyproxy/envoy/releases https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg https://access.redhat.com/security/cve/CVE-2021-28682 https://bugzilla.redhat.com/show_bug.cgi?id=1942272 • 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
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 TLS alert code, causing a NULL pointer exception to occur that crashes the application, resulting in a denial of service. • https://blog.envoyproxy.io https://github.com/envoyproxy/envoy/releases https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg https://access.redhat.com/security/cve/CVE-2021-28683 https://bugzilla.redhat.com/show_bug.cgi?id=1942263 • CWE-476: NULL Pointer Dereference •
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
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 service due to the null reference. • https://blog.envoyproxy.io https://github.com/envoyproxy/envoy-setec/pull/230 https://github.com/envoyproxy/envoy/releases/tag/v1.14.0 https://github.com/envoyproxy/envoy/security/advisories/GHSA-rqvq-hxw5-776j https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg https://access.redhat.com/security/cve/CVE-2021-29258 https://bugzilla.redhat.com/show_bug.cgi?id=1942280 • CWE-476: NULL Pointer Dereference CWE-617: Reachable Assertion •
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
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 JWT is presented or invalid. Due to a mistake in implementation, a JwtUnknownIssuer error was mistakenly converted to JwtMissed when `requires_any` was configured. So if `allow_missing` was configured under `requires_any`, an attacker can bypass authentication by presenting a JWT token with an issuer that is not in the provider list. • https://github.com/envoyproxy/envoy/commit/ea39e3cba652bcc4b11bb0d5c62b017e584d2e5a https://github.com/envoyproxy/envoy/pull/15194 https://github.com/envoyproxy/envoy/security/advisories/GHSA-4996-m8hf-hj27 • 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
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 •