PT-2023-1413 · Zyxel · Zyxel Nr7101

Published 2023-01-11 · Updated 2023-12-29 · CVE-2022-43392

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

AV:N/AC:L/Au:S/C:N/I:P/A:C

Name of the Vulnerable Software and Affected Versions Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0

Description The issue is related to a buffer overflow vulnerability in the parameter of the web server, which occurs due to the lack of input size validation. This could allow a remote attacker to cause denial-of-service (DoS) conditions by sending a crafted authorization request. The vulnerability is associated with the web server's handling of parameters, and exploitation can lead to service disruption.

Recommendations For Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, update to version V1.15(ACCC.3)C0 or later to resolve the issue. As a temporary workaround, consider restricting access to the web server or disabling the vulnerable parameter to minimize the risk of exploitation.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2023-00795

CVE-2022-43392

Affected Products

Zyxel Nr7101

References · 8

• https://zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-buffer-overflow-vulnerabilities-of-cpe-fiber-onts-and-wifi-extenders · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-43392 · Security Note
• https://osv.dev/vulnerability/CVE-2022-43392 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-00795 · Security Note
• https://t.me/cvenotify/41794 · Telegram Post
• https://t.me/cibsecurity/56326 · Telegram Post
• https://t.me/cvenotify/65624 · Telegram Post
• https://github.com/advisories/GHSA-9g4h-h3jx-fcjh · Note