Zyxel USG / ATP / VPN < 5.37 XSS

medium Nessus Plugin ID 186479

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Synopsis

The remote security gateway is affected by a cross-site scripting vulnerability.

Description

Firmware version of the Zyxel USG, ATP, or VPN is less than 5.37. This means the Zyxel device is vulnerable to the following cross-site scripting vulnerability:

- A cross-site scripting (XSS) vulnerability in the CGI program could allow an unauthenticated LAN-based attacker to store malicious scripts in a vulnerable device. A successful XSS attack could then result in the stored malicious scripts being executed to steal cookies when the user visits the specific CGI used for dumping ZTP logs. (CVE-2023-35136)

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.

Plugin Details

Severity: Medium

ID: 186479

File Name: zyxel_usg_CVE-2023-35139.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: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2023-35136

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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-2023-35136

IAVA: 2023-A-0655

Detections

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