CVE-2018-3761
Nextcloud Server OAuth2 Authentication Bypass
Description
Nextcloud Server before 12.0.8 and 13.0.3 suffer from improper authentication on the OAuth2 token endpoint. Missing checks potentially allowed handing out new tokens in case the OAuth2 client was partly compromised.
INFO
Published Date :
July 5, 2018, 4:29 p.m.
Last Modified :
Nov. 21, 2024, 4:06 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the Nextcloud Server package to a version not affected by this vulnerability.
- If you are using a version of Nextcloud Server before 12.0.8 or between 13.0.0 and 13.0.3, upgrade to a later version.
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-2018-3761.
| URL | Resource |
|---|---|
| https://hackerone.com/reports/343111 | Third Party Advisory |
| https://nextcloud.com/security/advisory/?id=nc-sa-2018-003 | Broken Link Vendor Advisory |
| https://hackerone.com/reports/343111 | Third Party Advisory |
| https://nextcloud.com/security/advisory/?id=nc-sa-2018-003 | Broken Link Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-3761 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-2018-3761
weaknesses.
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-2018-3761 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-3761 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://hackerone.com/reports/343111 Added Reference https://nextcloud.com/security/advisory/?id=nc-sa-2018-003 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Feb. 28, 2023
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Changed Reference Type https://nextcloud.com/security/advisory/?id=nc-sa-2018-003 Vendor Advisory https://nextcloud.com/security/advisory/?id=nc-sa-2018-003 Broken Link, Vendor Advisory Changed CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions up to (excluding) 12.0.8 *cpe:2.3:a:nextcloud:nextcloud_server:13.0.3:*:*:*:*:*:*:* OR *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions up to (excluding) 12.0.8 *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions from (including) 13.0.0 up to (excluding) 13.0.3 -
CVE Modified by [email protected]
Oct. 09, 2019
Action Type Old Value New Value Added CWE HackerOne CWE-287 -
CWE Remap by [email protected]
Oct. 03, 2019
Action Type Old Value New Value Changed CWE CWE-320 CWE-287 CWE-287 -
Initial Analysis by [email protected]
Aug. 28, 2018
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 (AV:N/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V3 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Changed Reference Type https://nextcloud.com/security/advisory/?id=nc-sa-2018-003 No Types Assigned https://nextcloud.com/security/advisory/?id=nc-sa-2018-003 Vendor Advisory Changed Reference Type https://hackerone.com/reports/343111 No Types Assigned https://hackerone.com/reports/343111 Third Party Advisory Added CWE CWE-320 Added CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions up to (excluding) 12.0.8 *cpe:2.3:a:nextcloud:nextcloud_server:13.0.3:*:*:*:*:*:*:*
Vulnerability Scoring Details
Base CVSS Score: 8.1
Base CVSS Score: 5.8
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.63 }} 0.35%
score
0.69328
percentile