Incorrect handling of H2 GOAWAY + SETTINGS frames
Envoy, which Pomerium is based on, can abnormally terminate if an H/2 GOAWAY and SETTINGS frame are received in the same IO event. ### Impact This can lead to a DoS in the presence of untrusted *upstream* servers. ### Patches 0.15.1 contains an upgraded envoy binary with this vulnerability patched. ### Workarounds If only trusted upstreams are configured, there is not substantial risk of this condition being triggered. ### References [envoy GSA](https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8) [envoy CVE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32780) [envoy announcement](https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ) ### For more information If you have any questions or comments about this advisory: * Open an issue in [pomerium/pomerium](https://github.com/pomerium/pomerium/issues) * Email us at [security@pomerium.com](mailto:security@pomerium.com)
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2021-39162US | medium5.0 | — | ||
Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, can abnormally terminate if an H/2 GOAWAY and SETTINGS frame are received in the same IO… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8WEB
- https://github.com/pomerium/pomeriumPACKAGE
- https://github.com/pomerium/pomerium/security/advisories/GHSA-gjcg-vrxg-xmgvWEB
- https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJWEB
- https://nvd.nist.gov/vuln/detail/CVE-2021-39162ADVISORY
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