title: Incorrect handling of internal redirects results in crash in Envoy
description: Envoy is an open source edge and service proxy, designed for cloud-native applications. The envoy common router will segfault if an internal redirect selects a route configured with direct response or redirect actions. This will result in a denial of service. As a workaround turn off internal redirects if direct response entries are configured on the same listener.
problem types: CWE-670: Always-Incorrect Control Flow Implementation
affected:
{
product: envoy
vendor: envoyproxy
versions:
status: affected, version: < 1.18.6
status: affected, version: >= 1.19.0, < 1.19.3
status: affected, version: >= 1.20.0, < 1.20.2
status: affected, version: >= 1.21.0, < 1.21.1
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.1
]