CVE-2022-29227

Description

Envoy is a cloud-native high-performance edge/middle/service proxy. In versions prior to 1.22.1 if Envoy attempts to send an internal redirect of an HTTP request consisting of more than HTTP headers, there’s a lifetime bug which can be triggered. If while replaying the request Envoy sends a local reply when the redirect headers are processed, the downstream state indicates that the downstream stream is not complete. On sending the local reply, Envoy will attempt to reset the upstream stream, but as it is actually complete, and deleted, this result in a use-after-free. Users are advised to upgrade. Users unable to upgrade are advised to disable internal redirects if crashes are observed.

How to fix CVE-2022-29227

To remediate CVE-2022-29227, upgrade the affected package to a fixed version below.

• —upgrade to 1.22.1 or later

Is CVE-2022-29227 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 1.22.1

CVSS scores

References (3)

• WEBgithub.com/envoyproxy/envoy/commit/fe7c69c248f4fe5a9080c7ccb35275b5218bb5ab
• WEBgithub.com/envoyproxy/envoy/security/advisories/GHSA-rm2p-qvf6-pvr6
• WEBnvd.nist.gov/vuln/detail/CVE-2022-29227