2021-32705 | Nextcloud Server DAV Endpoint information disclosure


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.

5.1 $0-$5k 0.10

A vulnerability was found in Nextcloud Server up to 19.0.12/20.0.10/20.10/21.0.2 (Cloud Software) and classified as problematic. Affected by this issue is an unknown function of the component DAV Endpoint. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. Impacted is confidentiality. CVE summarizes:

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the public DAV endpoint. This may have allowed an attacker to enumerate potentially valid share tokens or credentials. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.

The weakness was shared 07/12/2021. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2021-32705 since 05/12/2021. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 19.0.13, 20.0.11, 20.011 or 21.0.3 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Type

Name

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

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: 🔍
Class: Information disclosure
CWE: CWE-200
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒


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

Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Nextcloud Server 19.0.13/20.0.11/20.011/21.0.3
Patch: github.com

05/12/2021 CVE assigned
07/12/2021 +61 days Advisory disclosed
07/12/2021 +0 days VulDB entry created
07/15/2021 +3 days VulDB last updateAdvisory: github.com
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2021-32705 (🔒)

Created: 07/12/2021 20:50
Updated: 07/15/2021 16:41
Changes: (1) source_cve_cna
Complete: 🔍

Comments

Enable the mail alert feature now!



Source link