CVE-2023-22917

24.04.2023, 17:15

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.

Classic Buffer Overflow

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Zyxel	CNA	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE	ADP	---				---
CISA-ADP	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 75%

Vendor	Product	Version
zyxel	usg_flex_100_firmware	5.00 ≤ 𝑥 ≤ 5.32
zyxel	usg_flex_100w_firmware	5.00 ≤ 𝑥 ≤ 5.32
zyxel	usg_flex_200_firmware	5.00 ≤ 𝑥 ≤ 5.32
zyxel	usg_flex_50_firmware	5.00 ≤ 𝑥 ≤ 5.32
zyxel	usg_flex_50w_firmware	5.10 ≤ 𝑥 ≤ 5.32
zyxel	usg_flex_500_firmware	5.00 ≤ 𝑥 ≤ 5.32
zyxel	usg_flex_700_firmware	5.00 ≤ 𝑥 ≤ 5.32
zyxel	vpn100_firmware	5.00 ≤ 𝑥 ≤ 5.35
zyxel	vpn1000_firmware	5.00 ≤ 𝑥 ≤ 5.35
zyxel	vpn300_firmware	5.00 ≤ 𝑥 ≤ 5.35
zyxel	vpn50_firmware	5.00 ≤ 𝑥 ≤ 5.35
zyxel	usg_20w-vpn_firmware	5.10 ≤ 𝑥 ≤ 5.32
zyxel	atp100_firmware	5.10 ≤ 𝑥 ≤ 5.32
zyxel	atp100w_firmware	5.10 ≤ 𝑥 ≤ 5.32
zyxel	atp200_firmware	5.10 ≤ 𝑥 ≤ 5.32
zyxel	atp500_firmware	5.10 ≤ 𝑥 ≤ 5.32
zyxel	atp700_firmware	5.10 ≤ 𝑥 ≤ 5.32
zyxel	atp800_firmware	5.10 ≤ 𝑥 ≤ 5.32

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

References

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