CVE-2023-39957

Path traversal allows tricking the Talk Android app into writing files into it's root directory

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

Nextcloud Talk Android allows users to place video and audio calls through Nextcloud on Android. Prior to version 17.0.0, an unprotected intend allowed malicious third party apps to trick the Talk Android app into writing files outside of its intended cache directory. Nextcloud Talk Android version 17.0.0 has a patch for this issue. No known workarounds are available.

Nextcloud Talk Android permite a los usuarios realizar llamadas de vídeo y audio a través de Nextcloud en Android. Antes de la versión 17.0.0, una intención desprotegida permitía a aplicaciones maliciosas de terceros engañar a la aplicación Talk Android para que escribiera archivos fuera de su directorio de caché previsto. Nextcloud Talk Android versión 17.0.0 tiene un parche para este problema. No se conocen soluciones disponibles.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2023-08-07 CVE Reserved
2023-08-10 CVE Published
2024-09-11 EPSS Updated
2024-10-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

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

CAPEC

References (3)

URL	Tag	Source
https://hackerone.com/reports/1997029	Issue Tracking

URL	Date	SRC

URL	Date	SRC
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-36f7-93f3-mcfj	2023-08-16
https://github.com/nextcloud/talk-android/pull/3064	2023-08-16

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Nextcloud Search vendor "Nextcloud"		Talk Search vendor "Nextcloud" for product "Talk"				< 17.0.0 Search vendor "Nextcloud" for product "Talk" and version " < 17.0.0"		android		Affected
Nextcloud Search vendor "Nextcloud"		Talk Search vendor "Nextcloud" for product "Talk"				17.0.0 Search vendor "Nextcloud" for product "Talk" and version "17.0.0"		rc1, android		Affected
Nextcloud Search vendor "Nextcloud"		Talk Search vendor "Nextcloud" for product "Talk"				17.0.0 Search vendor "Nextcloud" for product "Talk" and version "17.0.0"		rc2, android		Affected
Nextcloud Search vendor "Nextcloud"		Talk Search vendor "Nextcloud" for product "Talk"				17.0.0 Search vendor "Nextcloud" for product "Talk" and version "17.0.0"		rc3, android		Affected