Nextcloud Server prior 27.0.1 excessive authentication

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Nextcloud Server. It has been declared as problematic. Affected by this vulnerability is an unknown functionality. Executing a manipulation can lead to excessive authentication. This vulnerability is registered as CVE-2023-39958. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Nextcloud Server (Cloud Software) and classified as problematic. This vulnerability affects some unknown processing. The manipulation with an unknown input leads to a excessive authentication vulnerability. The CWE definition for the vulnerability is CWE-307. The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks. As an impact it is known to affect confidentiality. CVE summarizes:

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 22.0.0 and prior to versions 22.2.10.13, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, missing protection allows an attacker to brute force the client secrets of configured OAuth2 clients. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 22.2.10.13, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.

The weakness was published 08/10/2023 as GHSA-vv27-g2hq-v48h. The advisory is available at github.com. This vulnerability was named CVE-2023-39958 since 08/07/2023. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1110.001 by the MITRE ATT&CK project.

Upgrading to version 22.2.10.13, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4 or 27.0.1 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

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CNA Base Score: 5.8
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Excessive authentication
CWE: CWE-307 / CWE-799 / CWE-400
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Server 22.2.10.13/23.0.12.8/24.0.12.5/25.0.9/26.0.4/27.0.1
Patch: github.com

Timelineinfo

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

Sourcesinfo

Product: github.com

Advisory: GHSA-vv27-g2hq-v48h
Status: Confirmed

CVE: CVE-2023-39958 (🔍)
GCVE (CVE): GCVE-0-2023-39958
GCVE (VulDB): GCVE-100-236830

Entryinfo

Created: 08/10/2023 20:56
Updated: 09/05/2023 11:22
Changes: 08/10/2023 20:56 (51), 09/05/2023 11:22 (9)
Complete: 🔍
Cache ID: 216::103

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