What is CVE-2021-32781?

CVE-2021-32781 is a high-severity vulnerability in Envoyproxy Envoy, classified under Use After Free. CVSS score: 8.6/10. Published 2021-08-24.

How severe is CVE-2021-32781?

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

Use After Free in Envoyproxy Envoy

CVE-2021-32781

Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions after Envoy sends a locally generated response it must stop further processing of request or response dat…

Vulnerability class: Use-After-Free

EPSS: 0.001 (22.3th 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:N/I:N/A:H.

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)

CWE-416 — Use After Free

References

www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history (x_refsource_MISC)
github.com/envoyproxy/envoy/security/advisories/GHSA-5vhv-gp9v-42qv (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2021-32781?: CVE-2021-32781 is a high-severity vulnerability in Envoyproxy Envoy, classified under Use After Free. CVSS score: 8.6/10. Published 2021-08-24.
How severe is CVE-2021-32781?: High severity. CVSS v3 base score is 8.6 out of 10.