CVE-2020-16844: Improper Authentication

October 1, 2020 (updated October 15, 2020)

In Istio, 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.

References

github.com/istio/istio/releases
istio.io/latest/news/security/istio-security-2020-009/
nvd.nist.gov/vuln/detail/CVE-2020-16844

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