中危 zyantific zydis 堆缓冲区溢出
CVE编号
CVE-2021-41253利用情况
暂无补丁情况
官方补丁披露时间
2021-11-09漏洞描述
Zydis is an x86/x86-64 disassembler library. Users of Zydis versions v3.2.0 and older that use the string functions provided in `zycore` in order to append untrusted user data to the formatter buffer within their custom formatter hooks can run into heap buffer overflows. Older versions of Zydis failed to properly initialize the string object within the formatter buffer, forgetting to initialize a few fields, leaving their value to chance. This could then in turn cause zycore functions like `ZyanStringAppend` to make incorrect calculations for the new target size, resulting in heap memory corruption. This does not affect the regular uncustomized Zydis formatter, because Zydis internally doesn't use the string functions in zycore that act upon these fields. However, because the zycore string functions are the intended way to work with the formatter buffer for users of the library that wish to extend the formatter, we still consider this to be a vulnerability in Zydis. This bug is patched starting in version 3.2.1. As a workaround, users may refrain from using zycore string functions in their formatter hooks until updating to a patched version.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 | zyantific | zydis | * | Up to (including) 3.2.0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | zydis | * | Up to (excluding) 3.2.1-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | zydis | * | Up to (excluding) 3.2.1-1 | |||||
- 攻击路径 远程
- 攻击复杂度 复杂
- 权限要求 普通权限
- 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 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-122 | 堆缓冲区溢出 |
| CWE-457 | 使用未经初始化的变量 |
| CWE-908 | 对未经初始化资源的使用 |
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