Privilege escalation in SonicWall Capture Client and NetExtender Windows Client
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2023-6340 |
| CWE-ID | CWE-121 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
NetExtender for Windows Client/Desktop applications / Other client software SonicWall Capture Client Client/Desktop applications / Antivirus software/Personal firewalls |
| Vendor | SonicWall |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Stack-based buffer overflow
EUVDB-ID: #VU85417
Risk: Low
CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-6340
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error when processing queries within the sfpmonitor.sys driver. A local user can trigger a stack-based buffer overflow and execute arbitrary code with elevated privileges.
Install updates from vendor's website.
Vulnerable software versionsNetExtender for Windows: 10.2.0.300 - 10.2.336
SonicWall Capture Client: before 3.7.11
External linkshttp://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0019
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.
