CVE-2021-39162
Incorrect handling of H2 GOAWAY + SETTINGS frames
8.6
HIGH
CVSS 3.1
EPSS 0.67%
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.
How to fix CVE-2021-39162
To remediate CVE-2021-39162, upgrade the affected package to a fixed version below.
- —upgrade to 1.18.4 or later
- —upgrade to 0.15.1 or later
- —upgrade to 0.15.1 or later
Is CVE-2021-39162 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 1.18.4, >= 1.19.0, < 1.19.1
- from 0, < 0.15.1
- from 0, < 0.15.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |