Zyxel USG ZyWALL CGI Program path traversal

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$5k-$25k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Zyxel USG ZyWALL, USG FLEX 100, USG FLEX 200, USG FLEX 500, USG FLEX 700, USG FLEX 50, USG20, ATP and VPN. This affects an unknown part of the component CGI Program Handler. Executing a manipulation can lead to path traversal. The identification of this vulnerability is CVE-2022-2030. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in Zyxel USG ZyWALL, USG FLEX 100, USG FLEX 200, USG FLEX 500, USG FLEX 700, USG FLEX 50, USG20, ATP and VPN (Firewall Software). This vulnerability affects an unknown functionality of the component CGI Program 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. CVE summarizes:

A directory traversal vulnerability caused by specific character sequences within an improperly sanitized URL was identified in some CGI programs of Zyxel USG FLEX 100(W) firmware versions 4.50 through 5.30, USG FLEX 200 firmware versions 4.50 through 5.30, USG FLEX 500 firmware versions 4.50 through 5.30, USG FLEX 700 firmware versions 4.50 through 5.30, USG FLEX 50(W) firmware versions 4.16 through 5.30, USG20(W)-VPN firmware versions 4.16 through 5.30, ATP series firmware versions 4.32 through 5.30, VPN series firmware versions 4.30 through 5.30, USG/ZyWALL series firmware versions 4.11 through 4.72, that could allow an authenticated attacker to access some restricted files on a vulnerable device.

The weakness was shared 07/19/2022. The advisory is shared for download at zyxel.com. This vulnerability was named CVE-2022-2030 since 06/08/2022. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/06/2022). The MITRE ATT&CK project declares the attack technique as T1006.

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

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Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (Zyxel Corporation): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/08/2022 🔍
07/19/2022 +41 days 🔍
07/19/2022 +0 days 🔍
08/06/2022 +18 days 🔍

Sourcesinfo

Vendor: zyxel.com

Advisory: zyxel.com
Status: Confirmed

CVE: CVE-2022-2030 (🔍)
GCVE (CVE): GCVE-0-2022-2030
GCVE (VulDB): GCVE-100-204184

Entryinfo

Created: 07/19/2022 14:09
Updated: 08/06/2022 14:31
Changes: 07/19/2022 14:09 (38), 08/06/2022 14:31 (12)
Complete: 🔍
Cache ID: 216::103

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