CVE编号
CVE-2021-39155利用情况
暂无补丁情况
N/A披露时间
2021-08-25漏洞描述
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. As a work around a Lua filter may be written to normalize Host header before the authorization check. This is similar to the Path normalization presented in the [Security Best Practices](https://istio.io/latest/docs/ops/best-practices/security/#case-normalization) guide.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。
参考链接 |
|
|---|---|
| https://datatracker.ietf.org/doc/html/rfc4343 | |
| https://github.com/istio/istio/security/advisories/GHSA-7774-7vr3-cc8j |
受影响软件情况
| # | 类型 | 厂商 | 产品 | 版本 | 影响面 | ||||
| 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 运行在以下环境 | |||||||||
| 应用 | istio | istio | * |
Up to (excluding) 1.9.8 |
|||||
| 运行在以下环境 | |||||||||
| 应用 | istio | istio | * |
From (including) 1.10.0 |
Up to (excluding) 1.10.4 |
||||
| 运行在以下环境 | |||||||||
| 应用 | istio | istio | * |
From (including) 1.11.0 |
Up to (excluding) 1.11.1 |
||||
- 攻击路径 网络
- 攻击复杂度 低
- 权限要求 无
- 影响范围 未更改
- 用户交互 需要
- 可用性 低
- 保密性 高
- 完整性 高
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