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

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Nextcloud Server up to 16.0.8/17.0.3/18.0.0. This issue affects some unknown processing of the file /download of the component Access Control. The manipulation results in access control. This vulnerability is known as CVE-2020-8139. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

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 access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. 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 VDB-151979. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

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

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Nextcloud Server 16.0.9/17.0.4/18.0.1

Timelineinfo

01/28/2020 🔍
03/20/2020 +52 days 🔍
03/21/2020 +1 days 🔍
04/18/2024 +1489 days 🔍

Sourcesinfo

Advisory: FEDORA-2020-c9863904de
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-8139 (🔍)
GCVE (CVE): GCVE-0-2020-8139
GCVE (VulDB): GCVE-100-151980
See also: 🔍

Entryinfo

Created: 03/21/2020 09:16
Updated: 04/18/2024 16:29
Changes: 03/21/2020 09:16 (40), 03/21/2020 09:21 (18), 10/04/2020 15:29 (1), 04/18/2024 16:29 (18)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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