What is CVE-2021-32777?

CVE-2021-32777 is a high-severity vulnerability in Envoyproxy Envoy, classified under CWE-551. CVSS score: 8.6/10. Published 2021-08-24.

How severe is CVE-2021-32777?

High severity. CVSS v3 base score is 8.6 out of 10.

Is CVE-2021-32777 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Envoyproxy Envoy

CVE-2021-32777

Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions when ext-authz extension is sending request headers to the external authorization service it must merge m…

EPSS: 0.000 (5.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

Affected products

Envoyproxy Envoy — versions >= 1.19.0, < 1.19.1, >= 1.18.0, < 1.18.4, >= 1.17.0, < 1.17.4

Weakness classification (CWE)

Public proof-of-concept exploits

n0-traces/cve_

References

github.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h (x_refsource_CONFIRM)
www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-32777?: CVE-2021-32777 is a high-severity vulnerability in Envoyproxy Envoy, classified under CWE-551. CVSS score: 8.6/10. Published 2021-08-24.
How severe is CVE-2021-32777?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2021-32777 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.