Vulnerability in Envoyproxy Envoy
CVE-2021-39204
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…
EPSS: 0.017 (74.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Envoyproxy Envoy — versions 1.19.0
- Pomerium — versions 0.15.0, >= 0.15.0, < 0.15.1, < 0.14.8
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_MISC, Not Applicable)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-39204?
- CVE-2021-39204 is a high-severity vulnerability in Envoyproxy Envoy, classified under Excessive Iteration. CVSS score: 7.5/10. Published 2021-09-09.
- How severe is CVE-2021-39204?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-39204 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.