6.8
MEDIUM
CVE-2020-8227
Nextcloud Desktop Client File Path Traversal
Description

Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.

INFO

Published Date :

Aug. 21, 2020, 9:15 p.m.

Last Modified :

Nov. 21, 2024, 5:38 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

0.9
Affected Products

The following products are affected by CVE-2020-8227 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.

ID Vendor Product Action
1 Linux linux_kernel
1 Nextcloud desktop
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-2020-8227.

URL Resource
https://hackerone.com/reports/590319 Exploit Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-032 Broken Link Exploit Vendor Advisory
https://security.gentoo.org/glsa/202009-09 Third Party Advisory
https://hackerone.com/reports/590319 Exploit Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-032 Broken Link Exploit Vendor Advisory
https://security.gentoo.org/glsa/202009-09 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-2020-8227 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-8227 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/590319
    Added Reference https://nextcloud.com/security/advisory/?id=NC-SA-2020-032
    Added Reference https://security.gentoo.org/glsa/202009-09
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Reanalysis by [email protected]

    Sep. 27, 2022

    Action Type Old Value New Value
    Changed CPE Configuration AND OR *cpe:2.3:a:nextcloud:desktop:2.6.4:*:*:*:*:*:*:* OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* AND OR *cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:* versions up to (excluding) 2.6.5 OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
  • Reanalysis by [email protected]

    Sep. 27, 2022

    Action Type Old Value New Value
    Changed Reference Type https://hackerone.com/reports/590319 Third Party Advisory https://hackerone.com/reports/590319 Exploit, Third Party Advisory
    Changed Reference Type https://nextcloud.com/security/advisory/?id=NC-SA-2020-032 Exploit, Vendor Advisory https://nextcloud.com/security/advisory/?id=NC-SA-2020-032 Broken Link, Exploit, Vendor Advisory
    Changed CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud:2.6.4:*:*:*:*:linux:*:* AND OR *cpe:2.3:a:nextcloud:desktop:2.6.4:*:*:*:*:*:*:* OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
  • Modified Analysis by [email protected]

    May. 24, 2022

    Action Type Old Value New Value
    Changed Reference Type https://security.gentoo.org/glsa/202009-09 No Types Assigned https://security.gentoo.org/glsa/202009-09 Third Party Advisory
  • CVE Modified by [email protected]

    Sep. 14, 2020

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202009-09 [No Types Assigned]
  • Initial Analysis by [email protected]

    Aug. 26, 2020

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:H/Au:S/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
    Changed Reference Type https://hackerone.com/reports/590319 No Types Assigned https://hackerone.com/reports/590319 Third Party Advisory
    Changed Reference Type https://nextcloud.com/security/advisory/?id=NC-SA-2020-032 No Types Assigned https://nextcloud.com/security/advisory/?id=NC-SA-2020-032 Exploit, Vendor Advisory
    Added CWE NIST CWE-22
    Added CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud:2.6.4:*:*:*:*:linux:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-8227 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.99 }} -0.29%

score

0.83363

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability