CVE-2024-42059

EUVD-2024-39427

03.09.2024, 02:15

A post-authentication command injection vulnerability in Zyxel ATP series firmware versions from V5.00 through V5.38, USG FLEX series firmware versions from V5.00 through V5.38, USG FLEX 50(W) series firmware versions from V5.00 through V5.38, and USG20(W)-VPN series firmware versions from V5.00 through V5.38 could allow an authenticated attacker with administrator privileges to execute some OS commands on an affected device by uploading a crafted compressed language file via FTP.

OS Command Injection

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.2 HIGH	NETWORK	LOW	HIGH	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 75%

Affected Products (NVD)

Vendor	Product	Version
zyxel	zld	5.00 ≤ 𝑥 < 5.39
zyxel	zld	5.00 ≤ 𝑥 < 5.39
zyxel	zld	5.00 ≤ 𝑥 < 5.39

𝑥

= Vulnerable software versions

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
zyxel	usg_flex_50w_firmware	5.00 ≤ 𝑥 ≤ 5.38	ADP
zyxel	atp800_firmware	5.00 ≤ 𝑥 ≤ 5.38	ADP
zyxel	usg_flex_700h_firmware	5.00 ≤ 𝑥 ≤ 5.38	ADP

Common Weakness Enumeration

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-09-03-2024