Istio vulnerable to denial of service attack due to Golang Regex Library

Istio is an open platform-independent service mesh that provides traffic management, policy enforcement, and telemetry collection. Prior to versions 1.15.2, 1.14.5, and 1.13.9, the Istio control plane, istiod, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted or oversized message which results in the control plane crashing when the Kubernetes validating or mutating webhook service is exposed publicly. This endpoint is served over TLS port 15017, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially external istiod topologies, this port is exposed over the public internet. Versions 1.15.2, 1.14.5, and 1.13.9 contain patches for this issue. There are no effective workarounds, beyond upgrading. This bug is due to an error in `regexp.Compile` in Go.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

未加控制的资源消耗(资源穷尽)

Istio 资源管理错误漏洞

Istio是一套连接、管理和保护微服务的开放平台。 Istio 存在资源管理错误漏洞，该漏洞源于容易受到请求处理错误的影响，攻击者利用该漏洞可以发送特制或超大消息，从而在 Kubernetes 验证或变异 webhook 服务公开时导致控制平台崩溃。

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