SB2024011907 - Multiple vulnerabilities in Nextcloud Guests

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Improper Handling of URL Encoding (Hex Encoding) (CVE-ID: CVE-2024-22402)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper handling of request URLs in Guests app. A remote user can load the pages of apps they are not allowed to access.

2) Improper Enforcement of Behavioral Workflow (CVE-ID: CVE-2024-22401)

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

The vulnerability exists due to improper enforcement of behavioral workflow. A remote user can reset the allowed apps list for Guest App users.

Remediation

Install update from vendor's website.

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v3qw-7vgv-2fxj
• https://github.com/nextcloud/guests/pull/1082
• https://hackerone.com/reports/2251074
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wr87-hx3w-29hh
• https://hackerone.com/reports/2250398