中危 nextcloud nextcloud 通过错误消息导致的信息暴露
CVE编号
CVE-2021-32766利用情况
POC 已公开补丁情况
官方补丁披露时间
2021-09-08漏洞描述
Nextcloud Text is an open source plaintext editing application which ships with the nextcloud server. In affected versions the Nextcloud Text application returned different error messages depending on whether a folder existed in a public link share. This is problematic in case the public link share has been created with "Upload Only" privileges. (aka "File Drop"). A link share recipient is not expected to see which folders or files exist in a "File Drop" share. Using this vulnerability an attacker is able to enumerate folders in such a share. Exploitation requires that the attacker has access to a valid affected "File Drop" link share. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.0.1. Users who are unable to upgrade are advised to disable the Nextcloud Text application in the app settings.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/nextcloud/security-advisories/security/advisories/GHSA-gcf... | |
| https://github.com/nextcloud/text/pull/1716 | |
| https://hackerone.com/reports/1253475 |
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 | nextcloud | nextcloud | * | Up to (excluding) 20.0.12 | |||||
| 运行在以下环境 | |||||||||
| 应用 | nextcloud | nextcloud | * | From (including) 21.0.0 | Up to (excluding) 21.0.4 | ||||
| 运行在以下环境 | |||||||||
| 应用 | nextcloud | nextcloud | * | From (including) 22.0.0 | Up to (excluding) 22.1.0 | ||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.2 | nextcloud | * | Up to (excluding) 20.0.12-lp152.3.12.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.3 | nextcloud | * | Up to (excluding) 20.0.12-bp153.2.6.1 | |||||
- 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 POC 已公开
- 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-209 | 通过错误消息导致的信息暴露 |
Exp相关链接
- avd.aliyun.com
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