Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, the CORS filter will segfault and crash Envoy when the `origin` header is removed and deleted between `decodeHeaders`and `encodeHeaders`. Versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12 have a fix for this issue. As a workaround, do not remove the `origin` header in the Envoy configuration.
Remediation
References
Related Vulnerabilities
Moodle Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2016-2157)
Moodle Other Vulnerability (CVE-2006-4937)
Envoy Proxy Uncontrolled Resource Consumption Vulnerability (CVE-2020-12605)
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