Privilege escalation in SonicWall Global VPN client

1) Unquoted search path or element

EUVDB-ID: #VU58669

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20047

CWE-ID: CWE-428 - Unquoted Search Path or Element

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insecure way of searching and loading DLL libraries. A local user can place a specially crafted DLL library onto the system and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SonicWall Global VPN client: 4.10.0 - 4.10.6.0913

CPE2.3

• cpe:2.3:a:sonicwall:global_vpn_client:4.10.0:*:*:*:*:*:*:*
• cpe:2.3:a:sonicwall:global_vpn_client:4.10.1:*:*:*:*:*:*:*
• cpe:2.3:a:sonicwall:global_vpn_client:4.10.2:*:*:*:*:*:*:*

External links

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0025

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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