Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade.
Advisories
Source ID Title
EUVD EUVD EUVD-2021-30704 Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 23 Apr 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-04-23T19:01:55.018Z

Reserved: 2021-11-16T00:00:00.000Z

Link: CVE-2021-43824

cve-icon Vulnrichment

Updated: 2024-08-04T04:03:09.023Z

cve-icon NVD

Status : Modified

Published: 2022-02-22T23:15:10.813

Modified: 2024-11-21T06:29:52.380

Link: CVE-2021-43824

cve-icon Redhat

Severity : Moderate

Publid Date: 2022-02-22T07:00:00Z

Links: CVE-2021-43824 - Bugzilla

cve-icon OpenCVE Enrichment

No data.