En resumen
- CVE-2021-39162 es una vulnerabilidad ALTO (CVSS 8.6) que afecta a github.com/pomerium/pomerium, envoy (envoyproxy), pomerium (pomerium).
- Probabilidad de explotación en los próximos 30 días (EPSS): 1.6%, mayor que el 76.3% de las vulnerabilidades.
- Solución: actualizar a 0.15.1, 1.18.4 o posterior.
Description
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
envoy CVE
envoy announcement
For more information
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NVD description
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 event. This can lead to a DoS in the presence of untrusted *upstream* servers. 0.15.1 contains an upgraded envoy binary with this vulnerability patched. If only trusted upstreams are configured, there is not substantial risk of this condition being triggered.
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