Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Envoyproxy | Envoy | < 1.18.6 |
Related Weaknesses (CWE)
References
- https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af62PatchThird Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2pIssue TrackingThird Party Advisory
- https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af62PatchThird Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2pIssue TrackingThird Party Advisory
FAQ
What is CVE-2021-43824?
CVE-2021-43824 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 wit...
How severe is CVE-2021-43824?
CVE-2021-43824 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-43824?
Check the references section above for vendor advisories and patch information. Affected products include: Envoyproxy Envoy.