CVE-2021-39156
Last modified
CVE-2021-39156 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.10% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Istio | Istio | < 1.9.8 |
| Istio | Istio | >= 1.10.0, < 1.10.3 |
| Istio | Istio | >= 1.11.0, < 1.11.1 |
References
- https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4rThird Party Advisory
- https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4rThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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