Istio versions 1.2.10 (End of Life) and prior, 1.3 through 1.3.7, and 1.4 through 1.4.3 allows authentication bypass. The Authentication Policy exact-path matching logic can allow unauthorized access to HTTP paths even if they are configured to be only accessed after presenting a valid JWT token. For example, an attacker can add a ? or # character to a URI that would otherwise satisfy an exact-path match.
Weakness
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Istio | Istio | 1.3 (including) | 1.3.7 (including) |
| Istio | Istio | 1.4.0 (including) | 1.4.3 (including) |
| OpenShift Service Mesh 1.0 | RedHat | servicemesh-proxy-0:1.0.7-1.el8 | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/114.html
- https://cwe.mitre.org/data/definitions/115.html
- https://cwe.mitre.org/data/definitions/151.html
- https://cwe.mitre.org/data/definitions/194.html
- https://cwe.mitre.org/data/definitions/22.html
- https://cwe.mitre.org/data/definitions/57.html
- https://cwe.mitre.org/data/definitions/593.html
- https://cwe.mitre.org/data/definitions/633.html
- https://cwe.mitre.org/data/definitions/650.html
- https://cwe.mitre.org/data/definitions/94.html
References
- https://access.redhat.com/errata/RHSA-2020:0477
- https://access.redhat.com/security/cve/cve-2020-8595
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595
- https://github.com/istio/istio/commits/master
- https://istio.io/news/security/
- https://istio.io/news/security/istio-security-2020-001/
- https://access.redhat.com/errata/RHSA-2020:0477
- https://access.redhat.com/security/cve/cve-2020-8595
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595
- https://github.com/istio/istio/commits/master
- https://istio.io/news/security/
- https://istio.io/news/security/istio-security-2020-001/