中危 zeromq libzmq 未进行输入大小检查的缓冲区拷贝（传统缓冲区溢出）
CVE编号
CVE-2021-20235利用情况
暂无补丁情况
官方补丁披露时间
2021-04-02漏洞描述
There's a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp. The decoder static allocator could have its sized changed, but the buffer would remain the same as it is a static buffer. A remote, unauthenticated attacker who sends a crafted request to the zeromq server could trigger a buffer overflow WRITE of arbitrary data if CURVE/ZAP authentication is not enabled. The greatest impact of this flaw is to application availability, data integrity, and confidentiality.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://bugzilla.redhat.com/show_bug.cgi?id=1921983 | |
| https://github.com/zeromq/libzmq/security/advisories/GHSA-fc3w-qxf5-7hp6 |
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 | zeromq | libzmq | * | From (including) 4.2.0 | Up to (excluding) 4.3.3 | ||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | zeromq3 | * | Up to (including) 4.3.1-4+deb10u2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | zeromq3 | * | Up to (excluding) 4.3.3-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | zeromq3 | * | Up to (excluding) 4.3.3-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | zeromq3 | * | Up to (excluding) 4.2.1-4+deb9u4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | zeromq3 | * | Up to (excluding) 4.3.3-1 | |||||
- 攻击路径 远程
- 攻击复杂度 容易
- 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 无影响
- 服务器危害 无影响
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-120 | 未进行输入大小检查的缓冲区拷贝（传统缓冲区溢出） |
| CWE-787 | 跨界内存写 |
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