VDB-245946 · CVE-2023-48303 · GHSA-2448-44rp-c7hh

Nextcloud Server/Enterprise Server up to 25.0.11/27.1.0 on Nextcloud External Storage access control

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.
2.5	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Nextcloud Server and Enterprise Server up to 25.0.11/27.1.0 on Nextcloud. This affects an unknown function of the component External Storage Handler. The manipulation results in access control. This vulnerability is identified as CVE-2023-48303. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Nextcloud Server and Enterprise Server up to 25.0.11/27.1.0 on Nextcloud (Cloud Software). Affected is an unknown functionality of the component External Storage Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on availability. CVE summarizes:

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and Nextcloud Enterprise Server, admins can change authentication details of user configured external storage. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.11, 26.0.6, and 27.1.0 contain a patch for this issue. No known workarounds are available.

The weakness was released 11/22/2023 as GHSA-2448-44rp-c7hh. The advisory is available at github.com. This vulnerability is traded as CVE-2023-48303 since 11/14/2023. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading 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.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Cloud Software

Vendor

Nextcloud

Name

Version

License

open-source

Website

Product: https://github.com/nextcloud/server/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.5
VulDB Meta Temp Score: 2.5

VulDB Base Score: 2.4
VulDB Temp Score: 2.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 2.7
NVD Vector: 🔍

CNA Base Score: 2.4
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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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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: 🔍

Patch: github.com

Timelineinfo

11/14/2023 🔍
11/22/2023 +8 days 🔍
11/22/2023 +0 days 🔍
12/15/2023 +23 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-2448-44rp-c7hh
Status: Confirmed

CVE: CVE-2023-48303 (🔍)
GCVE (CVE): GCVE-0-2023-48303
GCVE (VulDB): GCVE-100-245946

Entryinfo

Created: 11/22/2023 07:14
Updated: 12/15/2023 15:13
Changes: 11/22/2023 07:14 (53), 11/22/2023 07:21 (1), 12/15/2023 15:13 (11)
Complete: 🔍
Cache ID: 216::103