CVE-2021-37617
Nextcloud Desktop Client Uninstall File Execution Hijacking
Description
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. The Nextcloud Desktop Client invokes its uninstaller script when being installed to make sure there are no remnants of previous installations. In versions 3.0.3 through 3.2.4, the Client searches the `Uninstall.exe` file in a folder that can be written by regular users. This could lead to a case where a malicious user creates a malicious `Uninstall.exe`, which would be executed with administrative privileges on the Nextcloud Desktop Client installation. This issue is fixed in Nextcloud Desktop Client version 3.3.0. As a workaround, do not allow untrusted users to create content in the `C:\` system folder and verify that there is no malicious `C:\Uninstall.exe` file on the system.
INFO
Published Date :
Aug. 18, 2021, 6:15 p.m.
Last Modified :
Oct. 25, 2022, 4:18 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.3
Affected Products
The following products are affected by CVE-2021-37617
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-2021-37617.
| URL | Resource |
|---|---|
| https://github.com/nextcloud/desktop/pull/3497 | Patch Third Party Advisory |
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v | Third Party Advisory |
| https://hackerone.com/reports/1240749 | Permissions Required Third Party Advisory |
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-2021-37617 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-37617 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 -
Reanalysis by [email protected]
Oct. 25, 2022
Action Type Old Value New Value Added CWE NIST CWE-427 -
Initial Analysis by [email protected]
Aug. 24, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/nextcloud/desktop/pull/3497 No Types Assigned https://github.com/nextcloud/desktop/pull/3497 Patch, Third Party Advisory Changed Reference Type https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v No Types Assigned https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v Third Party Advisory Changed Reference Type https://hackerone.com/reports/1240749 No Types Assigned https://hackerone.com/reports/1240749 Permissions Required, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:* versions from (including) 3.0.3 up to (excluding) 3.3.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-37617 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-2021-37617
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.10270
percentile