CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 1CVE-2019-18802 – envoy: malformed request header may cause bypass of route matchers resulting in escalation of privileges or information disclosure
https://notcve.org/view.php?id=CVE-2019-18802
An issue was discovered in Envoy 1.12.0. An untrusted remote client may send an HTTP header (such as Host) with whitespace after the header content. Envoy will treat "header-value " as a different string from "header-value" so for example with the Host header "example.com " one could bypass "example.com" matchers. Se detectó un problema en Envoy versión 1.12.0. Un cliente remoto no confiable puede enviar un encabezado HTTP (como Host) con espacios en blanco después del contenido del encabezado. • http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00034.html https://blog.envoyproxy.io https://github.com/envoyproxy/envoy/commits/master https://github.com/envoyproxy/envoy/security/advisories/GHSA-356m-vhw2-wcm4 https://groups.google.com/forum/#%21forum/envoy-users https://access.redhat.com/security/cve/CVE-2019-18802 https://bugzilla.redhat.com/show_bug.cgi?id=1773447 • CWE-284: Improper Access Control •
CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 1CVE-2019-18801 – envoy: an untrusted remote client may send HTTP/2 requests that write to the heap outside of the request buffers when the upstream is HTTP/1
https://notcve.org/view.php?id=CVE-2019-18801
An issue was discovered in Envoy 1.12.0. An untrusted remote client may send HTTP/2 requests that write to the heap outside of the request buffers when the upstream is HTTP/1. This may be used to corrupt nearby heap contents (leading to a query-of-death scenario) or may be used to bypass Envoy's access control mechanisms such as path based routing. An attacker can also modify requests from other users that happen to be proximal temporally and spatially. Se detectó un problema en Envoy versión 1.12.0. • https://access.redhat.com/errata/RHSA-2019:4222 https://blog.envoyproxy.io https://github.com/envoyproxy/envoy/commits/master https://github.com/envoyproxy/envoy/security/advisories/GHSA-gxvv-x4p2-rppp https://groups.google.com/forum/#%21forum/envoy-users https://access.redhat.com/security/cve/CVE-2019-18801 https://bugzilla.redhat.com/show_bug.cgi?id=1773444 • CWE-131: Incorrect Calculation of Buffer Size CWE-787: Out-of-bounds Write •
CVSS: 7.5EPSS: 1%CPEs: 2EXPL: 2CVE-2019-18836
https://notcve.org/view.php?id=CVE-2019-18836
Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used." Envoy versión 1.12.0 permite una denegación de servicio remota debido a bucles de recursos, como es demostrado por una conexión TCP inactiva que es capaz de mantener un subproceso o hilo de trabajo en un bucle ocupado infinito cuando la función continue_on_listener_filters_timeout es usada. • https://blog.envoyproxy.io https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xvf-4396-cj46 https://github.com/istio/istio/issues/18229 https://groups.google.com/forum/#%21forum/envoy-users • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') •
CVSS: 7.8EPSS: 0%CPEs: 16EXPL: 0CVE-2019-15226
https://notcve.org/view.php?id=CVE-2019-15226
Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a maximum limit. The implementation in versions 1.10.0 through 1.11.1 for HTTP/1.x traffic and all versions of Envoy for HTTP/2 traffic had O(n^2) performance characteristics. A remote attacker may craft a request that stays below the maximum request header size but consists of many thousands of small headers to consume CPU and result in a denial-of-service attack. Al recibir los datos de cada encabezado de petición entrante, Envoy iterará sobre los encabezados de petición existentes para comprobar que el tamaño total de los encabezados permanezca por debajo del límite máximo. La implementación en las versiones 1.10.0 hasta 1.11.1 para el tráfico HTTP/1.x y todas las versiones de Envoy para el tráfico HTTP/2 tenían características de rendimiento O(n^2). • https://github.com/envoyproxy/envoy/commit/afc39bea36fd436e54262f150c009e8d72db5014 https://github.com/envoyproxy/envoy/commits/master https://github.com/envoyproxy/envoy/issues/8520 • CWE-400: Uncontrolled Resource Consumption •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 1CVE-2019-15225
https://notcve.org/view.php?id=CVE-2019-15225
In Envoy through 1.11.1, users may configure a route to match incoming path headers via the libstdc++ regular expression implementation. A remote attacker may send a request with a very long URI to result in a denial of service (memory consumption). This is a related issue to CVE-2019-14993. En Envoy versiones hasta 1.11.1, los usuarios pueden configurar una ruta (path) para que coincida con los encabezados de ruta (path) entrantes por medio de la implementación de expresiones regulares libstdc++. Un atacante remoto puede enviar una petición con una URI muy larga para resultar en una denegación de servicio (consumo de memoria). • https://github.com/envoyproxy/envoy/issues/7728 • CWE-770: Allocation of Resources Without Limits or Throttling •