CVE-2023-39954
Nextcloud User OIDC Impersonation Vulnerability
Description
user_oidc provides the OIDC connect user backend for Nextcloud, an open-source cloud platform. Starting in version 1.0.0 and prior to version 1.3.3, an attacker that obtained at least read access to a snapshot of the database can impersonate the Nextcloud server towards linked servers. user_oidc 1.3.3 contains a patch. No known workarounds are available.
INFO
Published Date :
Aug. 10, 2023, 3:15 p.m.
Last Modified :
Aug. 16, 2023, 7:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2023-39954
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-2023-39954.
| URL | Resource |
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gq | Patch Vendor Advisory |
| https://github.com/nextcloud/user_oidc/pull/636 | Patch |
| https://hackerone.com/reports/1994328 | 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-2023-39954 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-39954 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]
Aug. 16, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Changed Reference Type https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gq No Types Assigned https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gq Patch, Vendor Advisory Changed Reference Type https://github.com/nextcloud/user_oidc/pull/636 No Types Assigned https://github.com/nextcloud/user_oidc/pull/636 Patch Changed Reference Type https://hackerone.com/reports/1994328 No Types Assigned https://hackerone.com/reports/1994328 Permissions Required Added CPE Configuration OR *cpe:2.3:a:nextcloud:user_oidc:*:*:*:*:*:*:*:* versions from (including) 1.0.0 up to (excluding) 1.3.3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-39954 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-2023-39954
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} 0.03%
score
0.39159
percentile