One Article Review
| Source |  CVE Liste |
|---|---|
| Identifiant | 3123836 |
| Date de publication | 2021-07-23 22:15:08 (vue: 2021-07-24 01:05:42) |
| Titre | CVE-2021-32783 |
| Texte | Contour is a Kubernetes ingress controller using Envoy proxy. In Contour before version 1.17.1 a specially crafted ExternalName type Service may be used to access Envoy's admin interface, which Contour normally prevents from access outside the Envoy container. This can be used to shut down Envoy remotely (a denial of service), or to expose the existence of any Secret that Envoy is using for its configuration, including most notably TLS Keypairs. However, it *cannot* be used to get the *content* of those secrets. Since this attack allows access to the administration interface, a variety of administration options are available, such as shutting down the Envoy or draining traffic. In general, the Envoy admin interface cannot easily be used for making changes to the cluster, in-flight requests, or backend services, but it could be used to shut down or drain Envoy, change traffic routing, or to retrieve secret metadata, as mentioned above. The issue will be addressed in Contour v1.18.0 and a cherry-picked patch release, v1.17.1, has been released to cover users who cannot upgrade at this time. For more details refer to the linked GitHub Security Advisory. |
| Envoyé | Oui |
| Condensat | *cannot* *content* 2021 32783 above access addressed admin administration advisory allows any are attack available backend been before but can cannot change changes cherry cluster configuration container contour controller could cover crafted cve denial details down drain draining easily envoy existence expose externalname flight from general get github has however including ingress interface issue its keypairs kubernetes linked making may mentioned metadata more most normally notably options outside patch picked prevents proxy refer release released remotely requests retrieve routing secret secrets security service services shut shutting since specially such those time tls traffic type upgrade used users using variety version which who will |
| Tags | |
| Stories | Uber |
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