Vulnerability · Published Apr 24, 2023 · Assigned by Zyxel

CVE-2023-22917

High 7.5

In plain English

A high-severity buffer overflow in ATP series firmware from Zyxel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.9%top 40.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A buffer overflow vulnerability in the “sdwan_iface_ipc” binary of Zyxel ATP series firmware versions 5.10 through 5.32, USG FLEX series firmware versions 5.00 through 5.32, USG FLEX 50(W) firmware versions 5.10 through 5.32, USG20(W)-VPN firmware versions 5.10 through 5.32, and VPN series firmware versions 5.00 through 5.35, which could allow a remote unauthenticated attacker to cause a core dump with a request error message on a vulnerable device by uploading a crafted configuration file.

Affected products (as reported)

Vendor	Product	Versions
Zyxel	ATP series firmware	5.10 through 5.32
Zyxel	USG FLEX series firmware	5.00 through 5.32
Zyxel	USG FLEX 50(W) firmware	5.10 through 5.32
Zyxel	USG20(W)-VPN firmware	5.10 through 5.32
Zyxel	VPN series firmware	5.00 through 5.35

Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps