Vulnerability Description
Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Istio | Istio | < 1.9.8 |
Related Weaknesses (CWE)
References
- https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4rThird Party Advisory
- https://istio.io/latest/news/security/istio-security-2021-008Vendor Advisory
- https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4rThird Party Advisory
- https://istio.io/latest/news/security/istio-security-2021-008Vendor Advisory
FAQ
What is CVE-2021-39156?
CVE-2021-39156 is a vulnerability with a CVSS score of 8.1 (HIGH). Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 a...
How severe is CVE-2021-39156?
CVE-2021-39156 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-39156?
Check the references section above for vendor advisories and patch information. Affected products include: Istio Istio.