Nextcloud Server up to 16.0.8/17.0.3/18.0.0 Access Control /download access control

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CVSS Meta Temp Score
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5.1$0-$5k0.11

A vulnerability was found in Nextcloud Server up to 16.0.8/17.0.3/18.0.0 (Cloud Software). It has been classified as problematic. Affected is an unknown part of the file /download of the component Access Control. The manipulation with an unknown input leads to a privilege escalation vulnerability. CWE is classifying the issue as CWE-284. This is going to have an impact on confidentiality. CVE summarizes:

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.

The weakness was published 03/20/2020 (Website). The advisory is shared for download at nextcloud.com. This vulnerability is traded as CVE-2020-8139 since 01/28/2020. The exploitability is told to be easy. It is possible to launch the attack remotely. A authentication is necessary for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 16.0.9, 17.0.4 or 18.0.1 eliminates this vulnerability.

Similar entry is available at 151979.

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VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔒

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

NVD Base Score: 🔒

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-284
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Nextcloud Server 16.0.9/17.0.4/18.0.1

Timelineinfoedit

01/28/2020 CVE assigned
03/20/2020 +52 days Advisory disclosed
03/21/2020 +1 days VulDB entry created
10/04/2020 +197 days VulDB last update

Sourcesinfoedit

Advisory: nextcloud.com
Status: Not defined
Confirmation: 🔒

CVE: CVE-2020-8139 (🔒)
See also: 🔒

Entryinfoedit

Created: 03/21/2020 09:16 AM
Updated: 10/04/2020 03:29 PM
Changes: (1) advisory_confirm_url
Complete: 🔍

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