Zyxel Router Buffer Overflow Vulnerability (DoS)

medium Nessus Plugin ID 177214

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Synopsis

The router is affected by a buffer overflow / denial of service vulnerability.

Description

According to its model number and firmware revision, the remote Zyxel router is affected by a buffer overflow / denial of service vulnerability, due to a flaw in the CGI program. An authenticated, remote attacker can exploit this issue, via a crafted HTTP request, to cause the systeem to stop responding.

Solution

Upgrade to the Zyxel firmware referenced in the advisory.

Plugin Details

Severity: Medium

ID: 177214

File Name: zyxel_router_CVE-2023-27989.nasl

Version: 1.3

Type: remote

Family: Misc.

Published: 6/13/2023

Updated: 5/28/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-27989

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: x-cpe:/h:zyxel

Required KB Items: www/zyxel_router

Excluded KB Items: Settings/disable_cgi_scanning

Exploit Ease: No known exploits are available

Patch Publication Date: 6/6/2023

Vulnerability Publication Date: 6/6/2023

Reference Information

CVE: CVE-2023-27989

Detections

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