ZyXEL NAS 326 up to 5.21 Package Installer Shell Metacharacter command injection

Summaryinfo

A vulnerability has been found in ZyXEL NAS 326 up to 5.21 and classified as critical. This affects an unknown part of the component Package Installer. The manipulation as part of Shell Metacharacter leads to command injection. This vulnerability is uniquely identified as CVE-2019-10631. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in ZyXEL NAS 326 up to 5.21. This issue affects an unknown part of the component Package Installer. The manipulation as part of a Shell Metacharacter leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Shell Metacharacter Injection in the package installer on Zyxel NAS 326 version 5.21 and below allows an authenticated attacker to execute arbitrary code via multiple different requests.

The bug was discovered 04/04/2019. The weakness was disclosed 04/09/2019. The identification of this vulnerability is CVE-2019-10631 since 03/29/2019. The attack may be initiated remotely. A simple authentication is necessary for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/27/2023). MITRE ATT&CK project uses the attack technique T1202 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $0-$5k.

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

The entries VDB-133160, VDB-133159, VDB-133158 and VDB-133156 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• ZyXEL

Name

• NAS 326

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

License

• commercial

Website

• Vendor: https://www.zyxel.com/

CPE 2.3info

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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