Nextcloud Server 18.0.4 Encryption random values

entryeditHistoryDiffjsonxmlCTI

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 (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
2.4	$0-$5k	0.00

A vulnerability was found in Nextcloud Server 18.0.4 (Cloud Software). It has been classified as problematic. This affects an unknown code block of the component Encryption Handler. The manipulation with an unknown input leads to a weak encryption vulnerability. CWE is classifying the issue as CWE-330. This is going to have an impact on confidentiality. The summary by CVE is:

A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed decryption in shorter time than intended.

The weakness was released 11/03/2020. It is possible to read the advisory at hackerone.com. This vulnerability is uniquely identified as CVE-2020-8173 since 01/28/2020. The exploitability is told to be difficult. Access to the local network is required for this attack. The requirement for exploitation is a authentication. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Productinfoedit

Type

Cloud Software

Name

Nextcloud Server

CPE 2.3infoedit

🔒

CPE 2.2infoedit

🔒

CVSSv3infoedit

VulDB Meta Base Score: 2.4
VulDB Meta Temp Score: 2.4

VulDB Base Score: 2.6
VulDB Temp Score: 2.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 2.2
NVD Vector: 🔒

CVSSv2infoedit

AV	AC	Au	C	I	A
🔍	🔍	🔍	🔍	🔍	🔍
🔍	🔍	🔍	🔍	🔍	🔍
🔍	🔍	🔍	🔍	🔍	🔍

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔒

Exploitinginfoedit

Class: Weak encryption
CWE: CWE-330
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

01/28/2020 CVE assigned
11/03/2020 +280 days Advisory disclosed
11/03/2020 +0 days VulDB entry created
12/01/2020 +28 days VulDB last update

Sourcesinfoedit

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

CVE: CVE-2020-8173 (🔒)

Entryinfoedit