PT-2023-2587 · Zyxel · Zyxel Nbg-418N V2

Toni Koivunen · Published 2023-01-10 · Updated 2023-05-06 · CVE-2023-22922

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Zyxel NBG-418N v2 versions prior to V1.00(AARP.14)C0

Description A buffer overflow vulnerability could allow a remote unauthenticated attacker to cause DoS conditions by sending crafted packets if Telnet is enabled on a vulnerable device. The issue is related to the implementation of the Telnet network protocol in the Zyxel NBG-418N v2 firmware.

Recommendations For Zyxel NBG-418N v2 versions prior to V1.00(AARP.14)C0, update to a version that includes the fix for this issue. As a temporary workaround, consider disabling Telnet on the device until a patch is available.

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-120

Related Identifiers

BDU:2023-02403

CVE-2023-22922

Affected Products

Zyxel Nbg-418N V2

References · 9

• https://bdu.fstec.ru/vul/2023-02403 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-22922 · Security Note
• https://osv.dev/vulnerability/CVE-2023-22922 · Vendor Advisory
• https://zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-nbg-418n-v2-home-router · Vendor Advisory
• https://t.me/cibsecurity/63126 · Telegram Post
• https://vuldb.com/ru/?id.227800 · Note
• https://t.me/cvenotify/49561 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2023050206 · Note
• https://t.me/cvenotify/49526 · Telegram Post