Vulnerability in Envoyproxy Envoy
CVE-2021-39162
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.016 (76.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
- Envoyproxy Envoy — versions 1.19.0
- Pomerium — versions 0.15.0, >= 0.15.0, < 0.15.1
Weakness classification (CWE)
References
- groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ (Third Party Advisory, Not Applicable)
- github.com/pomerium/pomerium/security/advisories/GHSA-gjcg-vrxg-xmgv (Third Party Advisory)
- github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-39162?
- CVE-2021-39162 is a high-severity vulnerability in Envoyproxy Envoy, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 8.6/10. Published 2021-09-09.
- How severe is CVE-2021-39162?
- High severity. CVSS v3 base score is 8.6 out of 10.