Vulnerability · Published May 3, 2024 · Assigned by zdi

CVE-2023-40478NETGEAR RAX30 Telnet CLI passwd Stack-based Buffer Overflow Remote Code Execution Vulnerability

High 8.0

In plain English

A high-severity stack buffer overflow in RAX30 from NETGEAR. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities).

Severity (CVSS 3.0)8.0High

Exploit odds (30 days)0.8%top 42.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

NETGEAR RAX30 Telnet CLI passwd Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR RAX30 routers. 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. The issue 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. Was ZDI-CAN-20009.

Affected products (as reported)

Vendor	Product	Versions
NETGEAR	RAX30	1.0.9.92_1

Weakness: CWE-121 · Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

ZDI-23-1163 x_research-advisory
vendor-provided URL vendor-advisory