CVSS: 8.3EPSS: 0%CPEs: 3EXPL: 0CVE-2021-39156 – Fragments in Path May Lead to Authorization Policy Bypass
https://notcve.org/view.php?id=CVE-2021-39156
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. Istio es una plataforma de código abierto que proporciona una forma uniforme de integrar microservicios, administrar el flujo de tráfico entre microservicios, aplicar políticas y agregar datos de telemetría. • https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r https://istio.io/latest/news/security/istio-security-2021-008 https://access.redhat.com/security/cve/CVE-2021-39156 https://bugzilla.redhat.com/show_bug.cgi?id=1996915 • CWE-706: Use of Incorrectly-Resolved Name or Reference CWE-863: Incorrect Authorization •
CVSS: 8.3EPSS: 0%CPEs: 3EXPL: 0CVE-2021-39155 – Authorization Policy Bypass Due to Case Insensitive Host Comparison
https://notcve.org/view.php?id=CVE-2021-39155
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. According to [RFC 4343](https://datatracker.ietf.org/doc/html/rfc4343), Istio authorization policy should compare the hostname in the HTTP Host header in a case insensitive way, but currently the comparison is case sensitive. The proxy will route the request hostname in a case-insensitive way which means the authorization policy could be bypassed. As an example, the user may have an authorization policy that rejects request with hostname "httpbin.foo" for some source IPs, but the attacker can bypass this by sending the request with hostname "Httpbin.Foo". Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. • https://datatracker.ietf.org/doc/html/rfc4343 https://github.com/istio/istio/security/advisories/GHSA-7774-7vr3-cc8j https://access.redhat.com/security/cve/CVE-2021-39155 https://bugzilla.redhat.com/show_bug.cgi?id=1996929 • CWE-178: Improper Handling of Case Sensitivity CWE-863: Incorrect Authorization •