VDB-224662 · CVE-2023-28647 · GHSA-wjgg-2v4p-2gq6

Nextcloud App prior 4.7.0 on iOS Password Protection improper authentication

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.0	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Nextcloud App on iOS and classified as critical. This impacts an unknown function of the component Password Protection. Executing a manipulation can lead to improper authentication. This vulnerability is tracked as CVE-2023-28647. The physical device can be targeted for the attack. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Nextcloud App on iOS (iOS App Software) and classified as problematic. This vulnerability affects an unknown code of the component Password Protection. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Nextcloud iOS is an ios application used to interface with the nextcloud home cloud ecosystem. In versions prior to 4.7.0 when an attacker has physical access to an unlocked device, they may enable the integration into the iOS Files app and bypass the Nextcloud pin/password protection and gain access to a users files. It is recommended that the Nextcloud iOS app is upgraded to 4.7.0. There are no known workarounds for this vulnerability.

The weakness was disclosed 03/31/2023 as GHSA-wjgg-2v4p-2gq6. The advisory is available at github.com. This vulnerability was named CVE-2023-28647 since 03/20/2023. The technical details are unknown and an exploit is not available.

Upgrading to version 4.7.0 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.

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Productinfo

Type

iOS App Software

Vendor

Nextcloud

Name

License

open-source

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.1
VulDB Meta Temp Score: 4.1

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

CNA Base Score: 4.4
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
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: App 4.7.0
Patch: github.com

Timelineinfo

03/20/2023 🔍
03/31/2023 +10 days 🔍
03/31/2023 +0 days 🔍
03/31/2023 +0 days 🔍

Sourcesinfo

Advisory: GHSA-wjgg-2v4p-2gq6
Status: Confirmed

CVE: CVE-2023-28647 (🔍)
GCVE (CVE): GCVE-0-2023-28647
GCVE (VulDB): GCVE-100-224662

Entryinfo

Created: 03/31/2023 09:17
Changes: 03/31/2023 09:17 (53)
Complete: 🔍
Cache ID: 216::103