VDB-236835 · CVE-2023-39957 · GHSA-36f7-93f3-mcfj

Nextcloud Talk up to 16.x on Android path traversal

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6.2	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in Nextcloud Talk up to 16.x on Android. Impacted is an unknown function. Performing a manipulation results in path traversal. This vulnerability is known as CVE-2023-39957. Attacking locally is a requirement. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Nextcloud Talk up to 16.x on Android (Android App Software). This affects an unknown code. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published 08/10/2023 as GHSA-36f7-93f3-mcfj. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2023-39957 since 08/07/2023. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 17.0.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Android App Software

Vendor

Nextcloud

Name

Talk

Version

16.x

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 3.8
VulDB Temp Score: 3.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.2
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Talk 17.0.0
Patch: github.com

Timelineinfo

08/07/2023 🔍
08/10/2023 +3 days 🔍
08/10/2023 +0 days 🔍
09/05/2023 +26 days 🔍

Sourcesinfo

Advisory: GHSA-36f7-93f3-mcfj
Status: Confirmed

CVE: CVE-2023-39957 (🔍)
GCVE (CVE): GCVE-0-2023-39957
GCVE (VulDB): GCVE-100-236835
scip Labs: https://www.scip.ch/en/?labs.20130704

Entryinfo

Created: 08/10/2023 21:00
Updated: 09/05/2023 11:54
Changes: 08/10/2023 21:00 (53), 09/05/2023 11:54 (11)
Complete: 🔍
Cache ID: 216::103