CVE-2021-29258

HIGH

Envoy 1.14.0 - Denial of Service via Empty HTTP2 Metadata Map

Title source: llm
STIX 2.1

Description

An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.

References (5)

Core 5
Core References
Vendor Advisory x_refsource_misc
https://blog.envoyproxy.io
Third Party Advisory x_refsource_misc
https://github.com/envoyproxy/envoy/releases/tag/v1.14.0
Not Applicable, Third Party Advisory x_refsource_misc
https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg

Scores

CVSS v3 7.5
EPSS 0.0174
EPSS Percentile 74.7%
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-617
Status published
Products (4)
envoyproxy/envoy 1.14.6
envoyproxy/envoy 1.15.3
envoyproxy/envoy 1.16.2
envoyproxy/envoy 1.17.1
Published May 20, 2021
Tracked Since Feb 18, 2026