ZyXEL NSA325 V2 4.81 zyshclient command injection

Summaryinfo

A vulnerability was found in ZyXEL NSA325 V2 4.81. It has been rated as critical. The impacted element is an unknown function of the component zyshclient. The manipulation leads to command injection. This vulnerability is documented as CVE-2018-14893. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in ZyXEL NSA325 V2 4.81 and classified as critical. This issue affects an unknown function of the component zyshclient. The manipulation with an unknown input 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:

A system command injection vulnerability in zyshclient in ZyXEL NSA325 V2 version 4.81 allows attackers to execute system commands via the web application API.

The bug was discovered 11/03/2018. The weakness was released 11/27/2018 (Website). It is possible to read the advisory at blog.securityevaluators.com. The identification of this vulnerability is CVE-2018-14893 since 08/03/2018. The exploitation is known to be easy. The attack may be initiated remotely. The successful exploitation requires a simple authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/15/2020). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 24 days. During that time the estimated underground price was around $5k-$25k.

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

Entry connected to this vulnerability is available at VDB-127210. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• ZyXEL

Name

• NSA325 V2

Version

• 4.81

License

• commercial

Website

• Vendor: https://www.zyxel.com/

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CPE 2.2info

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

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