Detections
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Zyxel USG / ATP < 5.37 Buffer Overflow

medium Nessus Plugin ID 186481

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Synopsis

The remote security gateway is affected by a buffer overflow vulnerability.

Description

Firmware version of the Zyxel USG or ATP device is less than 5.37. This means the Zyxel device is vulnerable to the following buffer overflow vulnerability:

 - A buffer overflow vulnerability could allow an authenticated local attacker with administrator privileges to cause denial-of-service (DoS) conditions by executing the CLI command with crafted strings on an affected device.
 (CVE-2023-4397)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Zyxel USG / ATP / VPN to 5.37 or later.

See Also

http://www.nessus.org/u?d9098644

Plugin Details

Severity: Medium

ID: 186481

File Name: zyxel_usg_CVE-2023-4397.nasl

Version: 1.2

Type: combined

Family: Firewalls

Published: 11/30/2023

Updated: 12/4/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: CVSS2#AV:L/AC:L/Au:M/C:N/I:N/A:C

CVSS Score Source: CVE-2023-4397

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.9

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/h:zyxel:usg_flex

Required KB Items: installed_sw/Zyxel Unified Security Gateway (USG)

Exploit Ease: No known exploits are available

Patch Publication Date: 11/28/2023

Vulnerability Publication Date: 11/28/2023

Reference Information

CVE: CVE-2023-4397

IAVA: 2023-A-0655