中危 dena h2o 对未经初始化资源的使用
CVE编号
CVE-2021-43848利用情况
暂无补丁情况
官方补丁披露时间
2022-02-01漏洞描述
h2o is an open source http server. In code prior to the `8c0eca3` commit h2o may attempt to access uninitialized memory. When receiving QUIC frames in certain order, HTTP/3 server-side implementation of h2o can be misguided to treat uninitialized memory as HTTP/3 frames that have been received. When h2o is used as a reverse proxy, an attacker can abuse this vulnerability to send internal state of h2o to backend servers controlled by the attacker or third party. Also, if there is an HTTP endpoint that reflects the traffic sent from the client, an attacker can use that reflector to obtain internal state of h2o. This internal state includes traffic of other connections in unencrypted form and TLS session tickets. This vulnerability exists in h2o server with HTTP/3 support, between commit 93af138 and d1f0f65. None of the released versions of h2o are affected by this vulnerability. There are no known workarounds. Users of unreleased versions of h2o using HTTP/3 are advised to upgrade immediately.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://github.com/h2o/h2o/commit/8c0eca3 | |
| https://github.com/h2o/h2o/security/advisories/GHSA-f9xw-j925-m4m4 |
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 | dena | h2o | * | Up to (excluding) 2021-12-20 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | h2o | * | Up to (excluding) 2.2.5+dfsg2-2+deb10u1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | h2o | * | Up to (excluding) 2.2.5+dfsg2-6 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | h2o | * | Up to (excluding) 2.2.5+dfsg2-7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | h2o | * | Up to (excluding) 2.2.5+dfsg2-8 | |||||
- 攻击路径 本地
- 攻击复杂度 困难
- 权限要求 管控权限
- 影响范围 有限影响
- EXP成熟度 未验证
- 补丁情况 官方补丁
- 数据保密性 无影响
- 数据完整性 无影响
- 服务器危害 无影响
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-908 | 对未经初始化资源的使用 |
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