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CVE-2021-32777

Status Candidate

Overview

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 multiple value headers for authorization. A specifically constructed request may be delivered by an untrusted downstream peer in the presence of ext-authz extension. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to the ext-authz extension to correctly merge multiple request header values, when sending request for authorization.

Related Files

Red Hat Security Advisory 2021-3273-01
Posted Aug 27, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3273-01 - Red Hat OpenShift Service Mesh is Red Hat's distribution of the Istio service mesh project, tailored for installation into an on-premise OpenShift Container Platform installation. Issues addressed include bypass and denial of service vulnerabilities.

tags | advisory, denial of service, vulnerability
systems | linux, redhat
advisories | CVE-2021-32777, CVE-2021-32779, CVE-2021-32781, CVE-2021-39155, CVE-2021-39156
SHA-256 | 0a337cca1a247a8a2726799c8b8e280346469a4f3ec523b969f217eb5766ddd0
Download | Favorite | View
Red Hat Security Advisory 2021-3272-01
Posted Aug 27, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3272-01 - Red Hat OpenShift Service Mesh is Red Hat's distribution of the Istio service mesh project, tailored for installation into an on-premise OpenShift Container Platform installation. Issues addressed include bypass and denial of service vulnerabilities.

tags | advisory, denial of service, vulnerability
systems | linux, redhat
advisories | CVE-2021-32777, CVE-2021-32779, CVE-2021-32781, CVE-2021-39155, CVE-2021-39156
SHA-256 | 56ad4fa33c8573a80de0ceaf7952386e6d07274bd2804bbd5ade73cb2a6181dd
Download | Favorite | View
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