High severityNVD Advisory· Published Aug 24, 2021· Updated Aug 4, 2024
Fragments in Path May Lead to Authorization Policy Bypass
CVE-2021-39156
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
istio.io/istioGo | < 1.9.8 | 1.9.8 |
istio.io/istioGo | >= 1.10.0, < 1.10.4 | 1.10.4 |
istio.io/istioGo | >= 1.11.0, < 1.11.1 | 1.11.1 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- github.com/advisories/GHSA-hqxw-mm44-gc4rghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-39156ghsaADVISORY
- github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4rghsax_refsource_CONFIRMWEB
- istio.io/latest/news/security/istio-security-2021-008ghsax_refsource_MISCWEB
News mentions
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