PT-2023-1416 · Zyxel · Zyxel Nr7101

Published 2023-01-11 · Updated 2023-12-29 · CVE-2022-43391

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 versions prior to V1.15(ACCC.3)C0

Description The issue is caused by a buffer overflow vulnerability in the parameter of the CGI program. This could allow an authenticated attacker to cause denial-of-service (DoS) conditions by sending a crafted HTTP request.

Recommendations For Zyxel NR7101 firmware versions prior to V1.15(ACCC.3)C0, update to V1.15(ACCC.3)C0 or later to resolve the issue. As a temporary workaround, consider restricting access to the CGI program to minimize the risk of exploitation.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2023-00804

CVE-2022-43391

Affected Products

Zyxel Nr7101

References · 6

• 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-2022-43391 · Security Note
• https://osv.dev/vulnerability/CVE-2022-43391 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-00804 · Security Note
• https://t.me/cibsecurity/56324 · Telegram Post
• https://t.me/cvenotify/65623 · Telegram Post