CVE-2021-22915
Nextcloud Server IPv6 Brute Force Vulnerability
Description
Nextcloud server before 19.0.11, 20.0.10, 21.0.2 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.
INFO
Published Date :
June 11, 2021, 4:15 p.m.
Last Modified :
Nov. 7, 2023, 3:30 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2021-22915
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-2021-22915.
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-2021-22915 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-22915 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 -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference HackerOne https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/ [No types assigned] Added Reference HackerOne https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AGXGR6HYGQ6MZXISMJEHCOXRGRFRUFMA/ [No types assigned] Removed Reference HackerOne https://lists.fedoraproject.org/archives/list/[email protected]/message/AGXGR6HYGQ6MZXISMJEHCOXRGRFRUFMA/ Removed Reference HackerOne https://lists.fedoraproject.org/archives/list/[email protected]/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/ -
Modified Analysis by [email protected]
Sep. 20, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/AGXGR6HYGQ6MZXISMJEHCOXRGRFRUFMA/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/AGXGR6HYGQ6MZXISMJEHCOXRGRFRUFMA/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jul. 09, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/AGXGR6HYGQ6MZXISMJEHCOXRGRFRUFMA/ [No Types Assigned] Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/ [No Types Assigned] -
Initial Analysis by [email protected]
Jun. 23, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://hackerone.com/reports/1154003 No Types Assigned https://hackerone.com/reports/1154003 Permissions Required, Third Party Advisory Changed Reference Type https://nextcloud.com/security/advisory/?id=NC-SA-2021-009 No Types Assigned https://nextcloud.com/security/advisory/?id=NC-SA-2021-009 Broken Link Added CWE NIST CWE-307 Added CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions up to (excluding) 19.0.11 *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions from (including) 20.0.0 up to (excluding) 20.0.10 *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions from (including) 21.0.0 up to (excluding) 21.0.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-22915 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-2021-22915
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.54 }} 0.15%
score
0.76626
percentile