CVE-2021-39204: Excessive Iteration

September 10, 2021 (updated September 13, 2021)

Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, incorrectly handles resetting of HTTP/2 streams with excessive complexity. This can lead to high CPU utilization when a large number of streams are reset. This can result in a DoS condition. Pomerium versions 0.14.8 and 0.15.1 contain an upgraded envoy binary with this vulnerability patched.

References

github.com/advisories/GHSA-5wjf-62hw-q78r
github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc
github.com/pomerium/pomerium/security/advisories/GHSA-5wjf-62hw-q78r
nvd.nist.gov/vuln/detail/CVE-2021-39204

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