What is CVE-2023-4397?

CVE-2023-4397 is a medium-severity vulnerability in Zyxel Atp100, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 4.4/10. Published 2023-11-28.

How severe is CVE-2023-4397?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Buffer overflow in Zyxel Atp100

CVE-2023-4397

A buffer overflow vulnerability in the Zyxel ATP series firmware version 5.37, USG FLEX series firmware version 5.37, USG FLEX 50(W) series firmware version 5.37, and USG20(W)-VPN series firmware version 5.37, could allow an authenticated local attacker with administrator privileges to cause denial-of-service (DoS) conditions by executing the CLI command with crafted strings on an affected device.

Vulnerability class: Buffer Overflow

EPSS: 0.002 (14.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Affected products

Zyxel Atp100
Zyxel Atp100w
Zyxel Atp200
Zyxel Atp500
Zyxel Atp700
Zyxel Atp800
Zyxel Atp Series Firmware — versions 5.37
Zyxel Usg_20w-vpn
Zyxel Usg20(w)-vpn Series Firmware — versions 5.37
Zyxel Usg_flex_100

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

security@zyxel.com.tw (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2023-4397?: CVE-2023-4397 is a medium-severity vulnerability in Zyxel Atp100, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 4.4/10. Published 2023-11-28.
How severe is CVE-2023-4397?: Medium severity. CVSS v3 base score is 4.4 out of 10.