CVE-2021-39204

HIGH

Envoy < 1.16.4 - Denial of Service

Title source: rule
STIX 2.1

Description

Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, incorrectly handles resetting of HTTP/2 streams with excessive complexity. This can lead to high CPU utilization when a large number of streams are reset. This can result in a DoS condition. Pomerium versions 0.14.8 and 0.15.1 contain an upgraded envoy binary with this vulnerability patched.

Scores

CVSS v3 7.5
EPSS 0.0041
EPSS Percentile 61.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-834
Status published
Products (5)
envoyproxy/envoy 1.19.0
envoyproxy/envoy < 1.16.4
pomerium/pomerium 0.15.0
pomerium/pomerium < 0.14.8
pomerium/pomerium 0 - 0.14.8Go
Published Sep 09, 2021
Tracked Since Feb 18, 2026