Missing Authorization in Nextcloud Server



Published: 2020-03-20 | Updated: 2020-07-17
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-8139
CWE-ID CWE-862
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Nextcloud Server
Client/Desktop applications / Messaging software

Vendor Nextcloud

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Missing Authorization

EUVDB-ID: #VU30326

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8139

CWE-ID: CWE-862 - Missing Authorization

Exploit availability: No

Description

The vulnerability allows a remote authenticated user to gain access to sensitive information.

A missing access control check in Nextcloud Server < 18.0.1, < 17.0.4, and < 16.0.9 causes hide-download shares to be downloadable when appending /download to the URL.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Nextcloud Server: 18.0.0

External links

http://hackerone.com/reports/788257
http://nextcloud.com/security/advisory/?id=NC-SA-2020-015


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



###SIDEBAR###