Vulnerability in Istio
CVE-2020-16844
In Istio 1.5.0 though 1.5.8 and Istio 1.6.0 through 1.6.7, when users specify an AuthorizationPolicy resource with DENY actions using wildcard suffixes (e.g. *-some-suffix) for source principals or namespace fields, callers will never be denied access, bypassing the intended policy.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.011 (64.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: -0.000
Affected products
References
- github.com/istio/istio/releases (Vendor Advisory)
- istio.io/latest/news/security/istio-security-2020-009/ (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-16844?
- CVE-2020-16844 is a medium-severity vulnerability in Istio. CVSS score: 6.8/10. Published 2020-10-01.
- How severe is CVE-2020-16844?
- Medium severity. CVSS v3 base score is 6.8 out of 10.