Privilege escalation in SonicWall NetExtender for Windows

1) Unquoted search path or element

EUVDB-ID: #VU49356

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: N/A

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 the NetExtender VPN client for Windows allows usage of an unquoted search path when launching the VPN client. A local user can place a malicious library on the system and execute it with elevated privileges.

Successful vulnerability exploitation may allow an attacker to escalate privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NetExtender for Windows: 3.5.107 - 10.2.0.300

CPE2.3

• cpe:2.3:a:sonicwall:netextender_for_windows:3.5.107:*:*:*:*:*:*:*
• cpe:2.3:a:sonicwall:netextender_for_windows:4.0.138:*:*:*:*:*:*:*
• cpe:2.3:a:sonicwall:netextender_for_windows:5.5.156:*:*:*:*:*:*:*

External links

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0023

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.