A vulnerability was found in Nextcloud Talk up to 14.0.8/15.0.3 (Cloud Software). It has been declared as problematic. This vulnerability affects an unknown part of the component Conversation Member List 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 talk is a video & audio conferencing app for Nextcloud. In affected versions the talk app does not properly filter access to a conversations member list. As a result an attacker could use this vulnerability to gain information about the members of a Talk conversation, even if they themselves are not members. It is recommended that the Nextcloud Talk is upgraded to 14.0.9 or 15.0.4. There are no known workarounds for this vulnerability.

The weakness was published 04/01/2023 as GHSA-3m6r-479j-4chf. The advisory is available at github.com. This vulnerability was named CVE-2023-28845 since 03/24/2023. 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 to version 14.0.9 or 15.0.4 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.

Productinfo

Type

• Cloud Software

Vendor

• Nextcloud

Name

• Talk

Version

• 14.0.0
• 14.0.1
• 14.0.2
• 14.0.3
• 14.0.4
• 14.0.5
• 14.0.6
• 14.0.7
• 14.0.8
• 15.0.0
• 15.0.1
• 15.0.2
• 15.0.3

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Discussion