QID 731231

Date Published: 2024-03-14

QID 731231: Zyxel ATP Firewall Buffer Overflow Vulnerability (CVE-2023-33009)

Zyxel Communications Corp. is a manufacturer of DSL and other networking devices.

CVE-2023-33009: A buffer overflow vulnerability in the notification function in some firewall versions could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.

Affected Versions:
ATP ZLD V4.60 prior to V5.36 Patch 2

QID Detection Logic (Unauthenticated):
This QID checks for installed vulnerable firmware version by sending GET request to endpoint "ext-js/app/common/zld_product_spec.js".

Successful exploitation of this vulnerability may allow an unauthenticated attacker to cause DoS conditions and even a remote code execution on an affected device.

  • CVSS V3 rated as Critical - 9.8 severity.
  • CVSS V2 rated as High - 7.5 severity.
    • Solution
    Customer are advised to update the device firmware.
    For more details please refer to Zyxel Security Advisory.
    Vendor References

    CVEs related to QID 731231

    CVE-2023-33009 |
    Software Advisories
    Advisory ID Software Component Link
    Zyxel Security Advisory URL Logo www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls
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