Critical10
CVSS:4.0/ AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

PT-2025-69: Stack-based buffer overflow during HTTP GET/POST parameters parsing in LCD KVM over IP switch CL5708IM

Error type:

  • CWE-121:Stack-based Buffer Overflow

Vulnerability vector:

  • Base vulnerability score (CVSSv4.0): CVSS:4.0/ AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
  • Severity (CVSSv4.0): 10.0 (Critical)

Description:

The vulnerability was identified in LCD KVM over IP switch CL5708IM firmware version <v2.2.215.

The discovered vulnerability allows an attacker to execute arbitrary code or cause a denial‑of‑service. It is triggered by a stack‑based buffer overflow while parsing the HTTP GET/POST parameter, enabling unauthenticated remote attacker to gain code execution privileges.

Vulnerability status: Confirmed by vendor

Date of vulnerability remediation: 26.02.2025

Recommendations:

  • Update to version v2.2.215 or higher

Additional information: Security advisory, Press release

Researcher: Nataliya Tlyapova, Dmitry Sklyarov (Positive Technologies)

Identifiers:

CVE-2025-3711

BDU:2025-01809

Vendor:

ATEN INTERNATIONAL Co., Ltd.

Vulnerable product:

LCD KVM over IP switch CL5708IM

Vulnerable versions:

firmware version < v2.2.215