CVE-2016-9462
First published: Tue Mar 28 2017(Updated: )
Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying restore privileges when restoring a file. The restore capability of Nextcloud/ownCloud was not verifying whether a user has only read-only access to a share. Thus a user with read-only access was able to restore old versions.
Credit: support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nextcloud Server | <9.0.52 | |
| ownCloud | <9.0.4 |
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Reference Links
- http://www.securityfocus.com/bid/97285
- https://github.com/nextcloud/server/commit/1208953ba1d4d55a18a639846bbcdd66a2d5bc5e
- https://github.com/owncloud/core/commit/23383080731d092e079986464a8c4c9ffcb79f4c
- https://github.com/owncloud/core/commit/3b056fa68ce502ceb0db9b446dab3b9e7b10dd13
- https://github.com/owncloud/core/commit/c93eca49c32428ece03dd67042772d5fa62c8d6e
- https://github.com/owncloud/core/commit/d31720b6f1e8c8dfeb5e8805ab35ad7c8000b2f1
- https://hackerone.com/reports/146067
- https://nextcloud.com/security/advisory/?id=nc-sa-2016-005
- https://owncloud.org/security/advisory/?id=oc-sa-2016-015
Frequently Asked Questions
What is the severity of CVE-2016-9462?
CVE-2016-9462 has been rated as a moderate severity vulnerability due to its potential impact on file restoration security.
How do I fix CVE-2016-9462?
To fix CVE-2016-9462, upgrade Nextcloud Server to version 9.0.52 or higher, or ownCloud Server to version 9.0.4 or higher.
Who is affected by CVE-2016-9462?
CVE-2016-9462 affects users of Nextcloud Server versions before 9.0.52 and ownCloud Server versions before 9.0.4.
What types of access does CVE-2016-9462 exploit?
CVE-2016-9462 exploits a flaw that allows users with read-only access to restore shared files without proper permission verification.
Is there a known mitigation for CVE-2016-9462?
The primary mitigation for CVE-2016-9462 is to ensure that you are running the updated versions of Nextcloud or ownCloud that have addressed this vulnerability.
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