CVE-2022-24889 : Exploit Details and Defense Strategies

Nextcloud Server versions prior to 21.0.8, 22.2.4, and 23.0.1 are affected by an issue that allows tricking administrators into enabling unnecessary "recommended" apps, potentially expanding the attack surface. This vulnerability has a CVSS score of 2.4 (Low severity).

Understanding CVE-2022-24889

This CVE highlights the lack of proper data authenticity verification in Nextcloud Server, leading to potential security risks.

What is CVE-2022-24889?

CVE-2022-24889 pertains to the inadequate verification of data authenticity in Nextcloud Server versions before 21.0.8, 22.2.4, and 23.0.1, enabling attackers to manipulate administrators into enabling unneeded apps.

The Impact of CVE-2022-24889

The impact of this CVE is rated as Low, with a CVSS base score of 2.4. Although the confidentiality impact is none, it requires high privileges and user interaction, posing a security threat.

Technical Details of CVE-2022-24889

This section provides specific technical details related to the vulnerability.

Vulnerability Description

The vulnerability allows malicious actors to persuade administrators into activating unnecessary "recommended" apps, thereby increasing the attack surface.

Affected Systems and Versions

Nextcloud Server versions prior to 21.0.8, 22.2.4, and 23.0.1 are affected by this vulnerability. Users of these versions are at risk.

Exploitation Mechanism

The exploitation of this vulnerability involves manipulating administrators through misleading recommendations to enable unnecessary apps.

Mitigation and Prevention

To mitigate the risks associated with CVE-2022-24889, immediate steps and long-term security practices need to be implemented.

Immediate Steps to Take

Update Nextcloud Server to versions 21.0.8, 22.2.4, or 23.0.1 to address this vulnerability. Disable unnecessary apps and conduct a security review.

Long-Term Security Practices

Promote security awareness among administrators, regularly update software, and follow best security practices to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security advisories from Nextcloud and promptly apply patches to ensure the security of the server.