CVE-2017-0885: Infoleak
First published: Wed Apr 05 2017(Updated: )
Nextcloud Server before 9.0.55 and 10.0.2 suffers from a error message disclosing existence of file in write-only share. Due to an error in the application logic an adversary with access to a write-only share may enumerate the names of existing files and subfolders by comparing the exception messages.
Credit: support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nextcloud Server | <9.0.55 | |
| Nextcloud Server | >=10.0.0<10.0.2 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2017-0885?
CVE-2017-0885 is classified as a medium severity vulnerability due to potential information disclosure.
How do I fix CVE-2017-0885?
To fix CVE-2017-0885, upgrade to Nextcloud Server version 9.0.55 or later, or version 10.0.2 or later.
What does CVE-2017-0885 expose to attackers?
CVE-2017-0885 allows attackers with access to a write-only share to enumerate existing file and folder names through error messages.
Which versions of Nextcloud Server are affected by CVE-2017-0885?
CVE-2017-0885 affects Nextcloud Server versions prior to 9.0.55 and those from 10.0.0 to 10.0.2.
Is user authentication required to exploit CVE-2017-0885?
Yes, an attacker must have access to a write-only share in order to exploit CVE-2017-0885.
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