GHSA-j34v-3552-5r7j: 
vulnerability analysis and mitigation

Multiple security vulnerabilities were identified in Pomerium's embedded Envoy component, affecting versions prior to 0.16.4. The issues were disclosed on February 28, 2022, impacting the Go package github.com/pomerium/pomerium. These vulnerabilities encompass various security concerns ranging from moderate to high severity, including multiple CVEs affecting the underlying Envoy component (GitHub Advisory).

The vulnerability collection includes several CVEs with varying severity levels: CVE-2021-43824 (CVSS 6.5) involving JWT filter safe_regex match null pointer dereference, CVE-2021-43825 (CVSS 6.1) concerning use-after-free in response filters, CVE-2021-43826 (CVSS 6.1) related to TCP over HTTP tunneling, CVE-2022-21654 (CVSS 7.3) affecting mTLS session validation, CVE-2022-21655 (CVSS 7.5) involving internal redirects handling, and CVE-2022-21657 (CVSS 3.1) concerning X.509 Extended Key Usage bypass. The vulnerabilities are associated with multiple CWE categories including CWE-295, CWE-367, CWE-416, and CWE-476 (GitHub Advisory).

The vulnerabilities can lead to multiple security implications including potential Denial of Service (DoS) attacks, system crashes, unauthorized resource access, and improper certificate trust validation. These issues could potentially compromise the security and stability of affected systems (GitHub Advisory).

The vulnerabilities have been patched in Pomerium version 0.16.4. Users are strongly recommended to upgrade to this version as soon as possible to address these security issues. No alternative workarounds are available (GitHub Advisory).