CVE编号
CVE-2021-22901利用情况
暂无补丁情况
官方补丁披露时间
2021-06-12漏洞描述
curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL, it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory.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://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf | |
| https://curl.se/docs/CVE-2021-22901.html | |
| https://github.com/curl/curl/commit/7f4a9a9b2a49547eae24d2e19bc5c346e9026479 | |
| https://hackerone.com/reports/1180380 | |
| https://security.netapp.com/advisory/ntap-20210723-0001/ | |
| https://security.netapp.com/advisory/ntap-20210727-0007/ | |
| https://www.oracle.com//security-alerts/cpujul2021.html | |
| https://www.oracle.com/security-alerts/cpujan2022.html |
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 | haxx | curl | * |
From (including) 7.75.0 |
Up to (including) 7.76.1 |
||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.12 | curl | * |
Up to (excluding) 7.77.0-r0 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.13 | curl | * |
Up to (excluding) 7.77.0-r0 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.14 | curl | * |
Up to (excluding) 7.77.0-r0 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.15 | curl | * |
Up to (excluding) 7.77.0-r0 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | curl | * |
Up to (excluding) 7.77.0-r0 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_34 | curl | * |
Up to (excluding) 7.76.1-3.fc34 |
|||||
- 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 无影响
- 服务器危害 无影响
- 全网数量 N/A
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