Auth bypass in Cncf Envoy
CVE-2020-8664
CNCF Envoy through 1.13.0 has incorrect Access Control when using SDS with Combined Validation Context. Using the same secret (e.g. trusted CA) across many resources together with the combined validation context could lead to the “static” part of the validation context to be not applied, even though it was visible in the active config dump.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.013 (69.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history (Third Party Advisory, Release Notes)
- github.com/envoyproxy/envoy/security/advisories/GHSA-3x9m-pgmg-xpx8 (Third Party Advisory)
- access.redhat.com/errata/RHSA-2020:0734 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8664?
- CVE-2020-8664 is a medium-severity vulnerability in Cncf Envoy, classified under Improper Authentication. CVSS score: 5.3/10. Published 2020-03-04.
- How severe is CVE-2020-8664?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2020-8664 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.