中危 CoTURN授权问题漏洞
CVE编号
CVE-2020-26262利用情况
暂无补丁情况
官方补丁披露时间
2021-01-14漏洞描述
Coturn is free open source implementation of TURN and STUN Server. Coturn before version 4.5.2 by default does not allow peers to connect and relay packets to loopback addresses in the range of `127.x.x.x`. However, it was observed that when sending a `CONNECT` request with the `XOR-PEER-ADDRESS` value of `0.0.0.0`, a successful response was received and subsequently, `CONNECTIONBIND` also received a successful response. Coturn then is able to relay packets to the loopback interface. Additionally, when coturn is listening on IPv6, which is default, the loopback interface can also be reached by making use of either `[::1]` or `[::]` as the peer address. By using the address `0.0.0.0` as the peer address, a malicious user will be able to relay packets to the loopback interface, unless `--denied-peer-ip=0.0.0.0` (or similar) has been specified. Since the default configuration implies that loopback peers are not allowed, coturn administrators may choose to not set the `denied-peer-ip` setting. The issue patched in version 4.5.2. As a workaround the addresses in the address block `0.0.0.0/8`, `[::1]` and `[::]` should be denied by default unless `--allow-loopback-peers` has been specified.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。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 | coturn_project | coturn | * | Up to (excluding) 4.5.2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.13 | coturn | * | Up to (excluding) 4.5.2-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.14 | coturn | * | Up to (excluding) 4.5.2-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.15 | coturn | * | Up to (excluding) 4.5.2-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.16 | coturn | * | Up to (excluding) 4.5.2-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.17 | coturn | * | Up to (excluding) 4.5.2-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.18 | coturn | * | Up to (excluding) 4.5.2-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | coturn | * | Up to (excluding) 4.5.2-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | coturn | * | Up to (excluding) 4.5.1.1-1.1+deb10u2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | coturn | * | Up to (excluding) 4.5.2-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | coturn | * | Up to (excluding) 4.5.2-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | coturn | * | Up to (excluding) 4.5.0.5-1+deb9u3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | coturn | * | Up to (excluding) 4.5.2-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_32 | coturn-utils | * | Up to (excluding) 4.5.2-1.fc32 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_33 | coturn-utils | * | Up to (excluding) 4.5.2-1.fc33 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_EPEL_7 | coturn-utils | * | Up to (excluding) 4.5.2-1.el7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_EPEL_8 | coturn-utils | * | Up to (excluding) 4.5.2-1.el8 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04 | coturn | * | Up to (excluding) 4.5.0.3-1ubuntu0.4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04.7_lts | coturn | * | Up to (excluding) 4.5.0.3-1ubuntu0.4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04 | coturn | * | Up to (excluding) 4.5.0.7-1ubuntu2.18.04.3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04.5_lts | coturn | * | Up to (excluding) 4.5.0.7-1ubuntu2.18.04.3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_20.04 | coturn | * | Up to (excluding) 4.5.1.1-1.1ubuntu0.20.04.2 | |||||
- 攻击路径 远程
- 攻击复杂度 困难
- 权限要求 无需权限
- 影响范围 全局影响
- EXP成熟度 未验证
- 补丁情况 官方补丁
- 数据保密性 数据泄露
- 数据完整性 传输被破坏
- 服务器危害 无影响
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-441 | 未有动机的代理或中间人（混淆代理） |
| CWE-682 | 数值计算不正确 |
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