CVE-2020-8227

Gentoo Linux Security Advisory 202009-09

Severity Score

6.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Una falta de saneamiento de una respuesta del servidor en Nextcloud Desktop Client versión 2.6.4 para Linux permitió que un Servidor de Nextcloud malicioso almacenara archivos fuera del directorio de sincronización dedicado.

Multiple vulnerabilities have been found in Nextcloud Desktop Sync client, the worst of which may allow execution of arbitrary code. Versions less than 2.6.5 are affected.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-01-28 CVE Reserved
2020-08-21 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2025-04-14 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://hackerone.com/reports/590319	2024-08-04
https://nextcloud.com/security/advisory/?id=NC-SA-2020-032	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://security.gentoo.org/glsa/202009-09	2022-09-27

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Nextcloud Search vendor "Nextcloud"	Desktop Search vendor "Nextcloud" for product "Desktop"	< 2.6.5 Search vendor "Nextcloud" for product "Desktop" and version " < 2.6.5"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	-	-	Safe