Zyxel NAS326/NAS542 prior 5.21 file_upload-cgi unrestricted upload

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Zyxel NAS326 and NAS542. It has been classified as very critical. Affected by this issue is some unknown functionality of the file file_upload-cgi. This manipulation causes unrestricted upload. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is handled as CVE-2024-29974. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Zyxel NAS326 and NAS542 and classified as very critical. Affected by this vulnerability is an unknown code block of the file file_upload-cgi. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

** UNSUPPORTED WHEN ASSIGNED ** The remote code execution vulnerability in the CGI program “file_upload-cgi” in Zyxel NAS326 firmware versions before V5.21(AAZF.17)C0 and NAS542 firmware versions before V5.21(ABAG.14)C0 could allow an unauthenticated attacker to execute arbitrary code by uploading a crafted configuration file to a vulnerable device.

It is possible to read the advisory at zyxel.com. This vulnerability is known as CVE-2024-29974 since 03/22/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/04/2024). The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

Upgrading to version 5.21 eliminates this vulnerability.

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

Productinfo

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License

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 9.8
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: Unrestricted upload
CWE: CWE-434 / CWE-284 / CWE-266
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: NAS326/NAS542 5.21

Timelineinfo

03/22/2024 🔍
06/04/2024 +73 days 🔍
06/04/2024 +0 days 🔍
06/04/2024 +0 days 🔍

Sourcesinfo

Vendor: zyxel.com

Advisory: zyxel.com
Status: Confirmed

CVE: CVE-2024-29974 (🔍)
GCVE (CVE): GCVE-0-2024-29974
GCVE (VulDB): GCVE-100-266971

Entryinfo

Created: 06/04/2024 06:46
Updated: 06/04/2024 17:18
Changes: 06/04/2024 06:46 (63), 06/04/2024 06:48 (1), 06/04/2024 17:18 (1)
Complete: 🔍
Cache ID: 216::103

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