Zebra ZTC Industrial ZT400 and ZTC Desktop GK420d Authentication Bypass Using an Alternate Path or Channel (CVE-2023-4957)

medium Tenable OT Security Plugin ID 502253

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability of authentication bypass has been found on a Zebra Technologies ZTC ZT410-203dpi ZPL printer. This vulnerability allows an attacker that is in the same network as the printer, to change the username and password for the Web Page by sending a specially crafted POST request to the setvarsResults.cgi file. For this vulnerability to be exploitable, the printers protected mode must be disabled.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Zebra printers running Link-OS v6.0 and later have a protected mode that protects the printer from this vulnerability.
Activating this mode disables unauthorized changes and locks the current configuration until an administrator authorizes updates. By default, the secure mode is disabled as it is necessary to generate a password first.

For more information about the protected mode and to apply it to Zebra printer products that may be affected, see the Link-OS Printer Administration Guide.

NOTE: The ZT410 industrial printer was discontinued on Oct 1st, 2020. The service and support discontinuation dates are in September and December, 2025, depending on region. Further information regarding security settings and best practices, including "Protected Mode," can be found in the references of the product.

NOTE: the GK420d desktop printer was discontinued on Jan 31, 2022. The service and support discontinuation date is April 30, 2025.

For more information on the product resources, see GK420d Desktop Printer Support Manual.

For more information on this vulnerability, see INCIBE-CERT's Security Advisory.

Plugin Details

Severity: Medium

ID: 502253

File Name: tenable_ot_zebra_CVE-2023-4957.nasl

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 5/6/2024

Updated: 2/14/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.4

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

CVSS Score Source: CVE-2023-4957

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

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

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

Vulnerability Information

CPE: cpe:/o:zebra:zt410_firmware:-

Required KB Items: Tenable.ot/Zebra

Exploit Ease: No known exploits are available

Patch Publication Date: 10/11/2023

Vulnerability Publication Date: 10/11/2023

Reference Information

CVE: CVE-2023-4957

CWE: 288

Detections

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