PT-2023-4500 · NetGear · Netgear Rax30

Dmitry Janushkevich + 1 · Published 2023-08-22 · Updated 2025-01-03 · CVE-2023-40478

Positive Technologies (AI Summary)

CVSS v3.1

8.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions NETGEAR RAX30 (affected versions not specified)

Description The issue is related to a stack-based buffer overflow in the telnet CLI service of NETGEAR RAX30 routers, allowing network-adjacent attackers to execute arbitrary code on affected installations. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the telnet CLI service, which listens on TCP port 23, and results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Stack Overflow

Memory Corruption

Weakness Enumeration

CWE-121

CWE-787

Related Identifiers

BDU:2023-04903

CVE-2023-40478

ZDI-23-1163

Affected Products

Netgear Rax30

References · 7

• https://zerodayinitiative.com/advisories/ZDI-23-1163 · Security Note
• https://kb.netgear.com/000065649/Security-Advisory-for-Post-authentication-Buffer-Overflow-on-the-RAX30-PSV-2023-0002 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-40478 · Security Note
• https://bdu.fstec.ru/vul/2023-04903 · Security Note
• https://osv.dev/vulnerability/CVE-2023-40478 · Vendor Advisory
• https://t.me/cvenotify/106175 · Telegram Post
• https://twitter.com/CVEnew/status/1787139473748173010 · Twitter Post