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地图 / User with read-only access to a share can gain write access to sub-folders in the share

User with read-only access to a share can gain write access to sub-folders in the share

访问控制 / 权限提升 / #619484

厂商
Nextcloud
严重程度
低危 · CVSS 4.8
赏金
—
弱点
权限提升
研究员
@phil-davis
披露日期
2020-03-01
资产
nextcloud/server
CVE
CVE-2019-15621

该报告还没有中文解读。

原文摘录

摘自原文(1990 字符中的一小部分)
user0 creates folders /test and /test/sub user0 creates file /test/sub/file.txt user0 shares folder /test with user1 with read+share permissions (17) user1 receives the folder /test and can read-download /test/sub/file.txt - good user1 creates a link share of /test/sub - it has permissions 1 …
原文中的代码
curl --user user1:user1 "http://172.17.0.1:8081/ocs/v1.php/apps/files_sharing/api/v1/shares/3" -H "OCS-APIRequest: true"  -X PUT --data 'permissions=15'

默认不展示报告全文。以上为简短摘录,完整复现过程请阅读原文。版权归研究员与 Nextcloud 所有。

时间线

  • 报告提交
  • 公开披露
阅读 HackerOne 原文 ↗作者 @phil-davis · 版权归作者与 Nextcloud 所有

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