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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.

AI Insight

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
istio.io/istioGo
< 1.9.81.9.8
istio.io/istioGo
>= 1.10.0, < 1.10.41.10.4
istio.io/istioGo
>= 1.11.0, < 1.11.11.11.1

Affected products

57

Patches

Vulnerability mechanics

References

4

News mentions

0

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