CVE-2020-16844
Authorization bypass in Istio
6.8
MEDIUM
CVSS 3.1
EPSS 0.28%
Description
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. ### Specific Go Packages Affected istio.io/istio/pilot/pkg/security/authz/model/matcher
How to fix CVE-2020-16844
To remediate CVE-2020-16844, upgrade the affected package to a fixed version below.
- —upgrade to 1.5.9 or later
Is CVE-2020-16844 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 1.5.0, < 1.5.9
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.8 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N |