PT-2023-3759 · Zyxel · Zyxel Nr7101

Chengfeng Ye · Published 2023-06-05 · Updated 2023-06-12 · CVE-2023-27989

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Zyxel NR7101 versions prior to V1.00(ABUV.8)C0

Description The issue is related to a buffer overflow in the CGI interface of the Zyxel NR7101 firmware. This could allow a remote attacker to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device. The exploitation of this issue may result in a denial of service.

Recommendations For versions prior to V1.00(ABUV.8)C0, update to version V1.00(ABUV.8)C0 or later to resolve the issue. As a temporary workaround, consider restricting access to the CGI interface to minimize the risk of exploitation.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2023-04048

CVE-2023-27989

Affected Products

Zyxel Nr7101

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2023-27989 · Security Note
• https://bdu.fstec.ru/vul/2023-04048 · Security Note
• https://osv.dev/vulnerability/CVE-2023-27989 · Vendor Advisory
• https://zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-buffer-overflow-vulnerability-in-4g-lte-and-5g-nr-outdoor-routers · Patch, Vendor Advisory
• https://vuldb.com/?id.230695 · Note
• https://t.me/cibsecurity/64977 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2023060623 · Note