Zyxel ATP/USG FLEX/USG FLEX 50(W)/USG20(W)-VPN up to 5.38 URL path traversal

Summaryinfo

A vulnerability classified as critical has been found in Zyxel ATP, USG FLEX, USG FLEX 50(W) and USG20(W)-VPN up to 5.38. Affected by this issue is some unknown functionality of the component URL Handler. This manipulation causes path traversal. This vulnerability appears as CVE-2024-11667. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in Zyxel ATP, USG FLEX, USG FLEX 50(W) and USG20(W)-VPN up to 5.38. It has been declared as critical. Affected by this vulnerability is some unknown processing of the component URL Handler. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality. The summary by CVE is:

A directory traversal vulnerability in the web management interface of Zyxel ATP series firmware versions V5.00 through V5.38, USG FLEX series firmware versions V5.00 through V5.38, USG FLEX 50(W) series firmware versions V5.10 through V5.38, and USG20(W)-VPN series firmware versions V5.10 through V5.38 could allow an attacker to download or upload files via a crafted URL.

It is possible to read the advisory at zyxel.com. This vulnerability is known as CVE-2024-11667 since 11/25/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but an exploit is available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/06/2024). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 12/03/2024 with a due date of 12/24/2024:

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Network Encryption Software

Vendor

• Zyxel

Name

• ATP
• USG20(W)-VPN
• USG FLEX
• USG FLEX 50(W)

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9
• 5.10
• 5.11
• 5.12
• 5.13
• 5.14
• 5.15
• 5.16
• 5.17
• 5.18
• 5.19
• 5.20
• 5.21
• 5.22
• 5.23
• 5.24
• 5.25
• 5.26
• 5.27
• 5.28
• 5.29
• 5.30
• 5.31
• 5.32
• 5.33
• 5.34
• 5.35
• 5.36
• 5.37
• 5.38

License

• commercial

Website

• Vendor: https://www.zyxel.com/

CPE 2.3info

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CPE 2.2info

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