Nextcloud Server up to 27.1.9/28.0.5/29.0.0 Calendar Event access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Nextcloud Server up to 27.1.9/28.0.5/29.0.0. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Calendar Event Handler. Executing a manipulation can lead to access control. This vulnerability appears as CVE-2024-37887. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Nextcloud Server up to 27.1.9/28.0.5/29.0.0 and classified as critical. This vulnerability affects some unknown processing of the component Calendar Event Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality. CVE summarizes:

Nextcloud Server is a self hosted personal cloud system. Private shared calendar events' recurrence exceptions can be read by sharees. It is recommended that the Nextcloud Server is upgraded to 27.1.10 or 28.0.6 or 29.0.1 and that the Nextcloud Enterprise Server is upgraded to 27.1.10 or 28.0.6 or 29.0.1.

The advisory is shared for download at github.com. This vulnerability was named CVE-2024-37887 since 06/10/2024. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 27.1.10, 28.0.6 or 29.0.1 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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.8
VulDB Meta Temp Score: 3.7

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.5
NVD Vector: 🔍

CNA Base Score: 3.5
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Server 27.1.10/28.0.6/29.0.1
Patch: github.com

Timelineinfo

06/10/2024 🔍
06/14/2024 +4 days 🔍
06/14/2024 +0 days 🔍
08/09/2024 +56 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-h4xv-cjpm-j595
Status: Confirmed

CVE: CVE-2024-37887 (🔍)
GCVE (CVE): GCVE-0-2024-37887
GCVE (VulDB): GCVE-100-268708

Entryinfo

Created: 06/14/2024 18:52
Updated: 08/09/2024 02:44
Changes: 06/14/2024 18:52 (67), 08/09/2024 02:44 (12)
Complete: 🔍
Cache ID: 216::103

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