CVE-2021-41179
Nextcloud Unenforced Public Page Authentication Bypass
Description
Nextcloud is an open-source, self-hosted productivity platform. Prior to Nextcloud Server versions 20.0.13, 21.0.5, and 22.2.0, the Two-Factor Authentication wasn't enforced for pages marked as public. Any page marked as `@PublicPage` could thus be accessed with a valid user session that isn't authenticated. This particularly affects the Nextcloud Talk application, as this could be leveraged to gain access to any private chat channel without going through the Two-Factor flow. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5 or 22.2.0. There are no known workarounds aside from upgrading.
INFO
Published Date :
Oct. 25, 2021, 10:15 p.m.
Last Modified :
Oct. 29, 2021, 3:06 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2021-41179
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-41179.
| URL | Resource |
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7hvh-rc6f-px23 | Third Party Advisory |
| https://github.com/nextcloud/server/pull/28725 | Patch Third Party Advisory |
| https://hackerone.com/reports/1322865 | Permissions Required |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-41179 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-41179 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Oct. 29, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:P/I:N/A:N) Changed Reference Type https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7hvh-rc6f-px23 No Types Assigned https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7hvh-rc6f-px23 Third Party Advisory Changed Reference Type https://github.com/nextcloud/server/pull/28725 No Types Assigned https://github.com/nextcloud/server/pull/28725 Patch, Third Party Advisory Changed Reference Type https://hackerone.com/reports/1322865 No Types Assigned https://hackerone.com/reports/1322865 Permissions Required Added CPE Configuration OR *cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:* versions from (including) 20.0.3 up to (excluding) 20.0.13 *cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:* versions from (including) 21.0.1 up to (excluding) 21.0.5 *cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:* versions from (including) 22.1.1 up to (excluding) 22.2.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-41179 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-41179
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.10 }} 0.00%
score
0.41505
percentile