Improper access control in DiskStation Manager (DSM) - CVE-2021-26563
Published: April 20, 2021
Vulnerability identifier: #VU52351
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:U/U:Clear
CVE-ID: CVE-2021-26563
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Synology Inc.
Affected software:
DiskStation Manager (DSM)
DiskStation Manager (DSM)
Detailed vulnerability description
The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in AppArmor’s synosearchagent profile. A local administrator can use a specially crafted kernel module to bypass the AppArmor’s restrictions.
How to mitigate CVE-2021-26563
Install updates from vendor's website.