QID 379301

Date Published: 2024-02-19

QID 379301: SonicWall NetExtender Windows Client Denial of Service (DoS) Vulnerability (SNWLID-2023-0019)

SonicWALL NetExtender is a software application that enables remote users to securely connect to the remote network.

SonicWall NetExtender Client Windows client affected versions are being installed with sfpmonitor.sys driver. The client applications communicate with the driver through queries. The driver method that handles those queries has Stack-based Buffer Overflow vulnerability that allows an attacker to craft a specific query to overwrite kernel memory, causing Denial of Service (DoS) which potentially leads to code execution in the target operating system.

Note: To perform the upgrade for NetExtender, it is necessary to uninstall the vulnerable version first and then install the new version.

Affected Product versions:
NetExtender Windows Client 10.2.337 and earlier versions.
QID Detection Logic:
This QID detects the vulnerable version from the SonicWall NetExtender Executable.

Successful exploitation of this vulnerability causes Denial of Service (DoS).

  • CVSS V3 rated as Medium - 5.5 severity.
  • CVSS V2 rated as Medium - 3.6 severity.
    • Solution
    Vendor has released patch. For more details, please refer to SNWLID-2023-0019
    Vendor References

    CVEs related to QID 379301

    CVE-2023-6340 |
    Software Advisories
    Advisory ID Software Component Link
    SNWLID-2023-0019 URL Logo psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0019/
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