PT-2023-7452 · Zyxel · Zyxel Usg Flex+1

Published 2023-01-10 · Updated 2023-05-04 · CVE-2023-22914

Positive Technologies (AI Summary)

CVSS v2.0

7.9

High

Base vector

AV:N/AC:M/Au:M/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Zyxel USG FLEX series firmware versions 4.50 through 5.35 Zyxel VPN series firmware versions 4.30 through 5.35

Description A path traversal vulnerability in the account print.cgi CGI program could allow a remote authenticated attacker with administrator privileges to execute unauthorized OS commands in the tmp directory by uploading a crafted file if the hotspot function were enabled. This issue is related to incorrect restriction of the path name to the tmp directory.

Recommendations For Zyxel USG FLEX series firmware versions 4.50 through 5.35, consider disabling the account print.cgi CGI program until a patch is available. For Zyxel VPN series firmware versions 4.30 through 5.35, restrict access to the tmp directory to minimize the risk of exploitation. As a temporary workaround, avoid using the hotspot function until the issue is resolved.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

BDU:2023-08493

CVE-2023-22914

Affected Products

Zyxel Usg Flex

Zyxel Vpn

References · 8

• https://zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-22914 · Security Note
• https://osv.dev/vulnerability/CVE-2023-22914 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-08493 · Security Note
• https://xakep.ru/2023/06/29/zyxel-patches · Note
• https://vuldb.com/ru/?id.227311 · Note
• https://ptsecurity.com/ru-ru/about/news/positive-technologies-pomogla-zakryt-uyazvimosti-v-mezhsetevyh-ehkranah-i-tochkah-dostupa-zyxel · Note
• https://t.me/cibsecurity/62725 · Telegram Post