#VU75180 Violation of Secure Design Principles in Talk - CVE-2023-30540

Vulnerability identifier: #VU75180

Vulnerability risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-30540

CWE-ID: CWE-657

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Talk
Client/Desktop applications / Messaging software

Vendor: Nextcloud

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to violation of secure design principles. A remote user that was added later to a conversation can get access to data that was deleted before they were added to the conversation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Talk: 15.0.0 - 15.0.4

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External links
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-c9hr-cq65-9mjw
https://github.com/nextcloud/spreed/pull/8985
https://hackerone.com/reports/1894676

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.