Buffer Overflow Vulnerability in Zyxel ATP and USG FLEX Series Firmware
CVE-2023-4397

4.4MEDIUM

Key Information:

Vendor

Zyxel
Status
ATP series firmware
USG FLEX series firmware
USG FLEX 50(W) series firmware
USG20(W)-VPN series firmware
Vendor
CVE Published:
28 November 2023

What is CVE-2023-4397?

A buffer overflow vulnerability exists in the Zyxel ATP series and USG FLEX series firmware version 5.37. This flaw enables an authenticated local attacker with administrative privileges to exploit the vulnerability by executing specific Command Line Interface (CLI) commands containing crafted strings. The successful exploitation may lead to denial-of-service (DoS) conditions on the affected device, compromising the integrity and availability of the network services.

Affected Version(s)

USG FLEX 50(W) series firmware 5.37

ATP series firmware 5.37

USG FLEX series firmware 5.37

References

https://www.zyxel.com/global/en/support/security-advisori...
vendor-advisory

CVSS V3.1

Score:
4.4
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2023-4397 : Buffer Overflow Vulnerability in Zyxel ATP and USG FLEX Series Firmware