CVE-2021-39162

Incorrect handling of H2 GOAWAY + SETTINGS frames

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.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.67% Top 30%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory google.com
Affected: pomerium pomerium
Published at:
Updated at:

References

Link Tags
https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ third party advisory not applicable
https://github.com/pomerium/pomerium/security/advisories/GHSA-gjcg-vrxg-xmgv third party advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8 third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-39162?
CVE-2021-39162 has been scored as a high severity vulnerability.
How to fix CVE-2021-39162?
To fix CVE-2021-39162, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-39162 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-39162 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-39162?
CVE-2021-39162 affects pomerium pomerium.
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