CVE-2021-39204

moderate-risk
Published 2021-09-09

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.

Do I need to act?

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0.41% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (4)

Pomerium
Pomerium

Affected Vendors

Envoyproxy Pomerium

References (6)

Third Party Advisory https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc
Third Party Advisory https://github.com/pomerium/pomerium/security/advisories/GHSA-5wjf-62hw-q78r
Not Applicable https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ
Third Party Advisory https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc
Third Party Advisory https://github.com/pomerium/pomerium/security/advisories/GHSA-5wjf-62hw-q78r
Not Applicable https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ
38
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 2/34 · Minimal
Exposure 10/34 · Low