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Nextcloud Server Brute-Force Protection Vulnerability (NC-SA-2021-009)

Information

Severity

Severity

Medium

Family

Family

Web application abuses

CVSSv2 Base

CVSSv2 Base

6.4

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:N

Solution Type

Solution Type

Vendor Patch

Created

Created

2 years ago

Modified

Modified

2 years ago

Summary

Nextcloud Server is prone to a vulnerability in the brute-force protection.

Insight

Insight

Nextcloud server is vulnerable to brute force attacks due to lack of inclusion of IPv6 subnets in rate-limiting considerations. This could potentially result in an attacker bypassing rate-limit controls such as the Nextcloud brute-force protection.

Affected Software

Affected Software

Nextcloud server prior to versions 19.0.11, 20.x through 20.0.9 and 21.x through 21.0.1.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Update to version 19.0.11, 20.0.10, 21.0.2 or later.

Common Vulnerabilities and Exposures (CVE)