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{"acknowledgement": "Red Hat would like to thank the Istio Product Security Working Group for reporting this issue.", "affected_release": [{"advisory": "RHSA-2021:3273", "cpe": "cpe:/a:redhat:service_mesh:1.1::el8", "package": "servicemesh-0:1.1.17-3.el8", "product_name": "OpenShift Service Mesh 1.1", "release_date": "2021-08-25T00:00:00Z"}, {"advisory": "RHSA-2021:3272", "cpe": "cpe:/a:redhat:service_mesh:2.0::el8", "package": "servicemesh-0:2.0.7-3.el8", "product_name": "OpenShift Service Mesh 2.0", "release_date": "2021-08-25T00:00:00Z"}], "bugzilla": {"description": "istio/istio: HTTP request with fragment in URI can bypass authorization mechanisms", "id": "1996915", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1996915"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L", "status": "verified"}, "cwe": "CWE-863", "details": ["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\u2019s 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.", "An authorization bypass vulnerability was found in istio/istio. An HTTP request is incorrectly evaluated when a URI #fragment is specified. This flaw allows an attacker to bypass an Istio URI-based authorization rule. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability."], "name": "CVE-2021-39156", "public_date": "2021-08-24T19:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-39156\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-39156\nhttps://istio.io/latest/news/security/istio-security-2021-008/"], "threat_severity": "Important"}