Nextcloud Server up to 24.0.8/25.0.2 name resolution

HistoryDiffrelatejsonxmlCTI

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.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Nextcloud Server up to 24.0.8/25.0.2. It has been declared as problematic. This affects an unknown function. Executing a manipulation can lead to name resolution. This vulnerability is registered as CVE-2023-28643. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Nextcloud Server up to 24.0.8/25.0.2 (Cloud Software). This vulnerability affects some unknown processing. The manipulation with an unknown input leads to a name resolution vulnerability. The CWE definition for the vulnerability is CWE-706. The product uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Nextcloud server is an open source home cloud implementation. In affected versions when a recipient receives 2 shares with the same name, while a memory cache is configured, the second share will replace the first one instead of being renamed to `{name} (2)`. It is recommended that the Nextcloud Server is upgraded to 25.0.3 or 24.0.9. Users unable to upgrade should avoid sharing 2 folders with the same name to the same user.

The weakness was published 03/31/2023 as 34015. The advisory is available at github.com. This vulnerability was named CVE-2023-28643 since 03/20/2023. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 24.0.9 or 25.0.3 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

Server

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: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 5.5
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: Name resolution
CWE: CWE-706
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: 🔍

Upgrade: Server 24.0.9/25.0.3
Patch: github.com

Timelineinfo

03/20/2023 🔍
03/31/2023 +10 days 🔍
03/31/2023 +0 days 🔍
04/20/2023 +20 days 🔍

Sourcesinfo

Product: github.com

Advisory: 34015
Status: Confirmed

CVE: CVE-2023-28643 (🔍)
GCVE (CVE): GCVE-0-2023-28643
GCVE (VulDB): GCVE-100-224650

Entryinfo

Created: 03/31/2023 09:09
Updated: 04/20/2023 19:28
Changes: 03/31/2023 09:09 (51), 04/20/2023 19:28 (11)
Complete: 🔍
Cache ID: 216::103