A vulnerability classified as critical was found in ZTE ZX297520V3 7520V3V1.0.0B09P27. Affected by this vulnerability is an unknown part of the component Terminal System. The manipulation with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The 7520V3V1.0.0B09P27 version, and all earlier versions of ZTE product ZX297520V3 are impacted by a Command Injection vulnerability. Unauthorized users can exploit this vulnerability to control the user terminal system.

The weakness was released 10/31/2019 (Website). The advisory is shared at support.zte.com.cn. This vulnerability is known as CVE-2019-3421 since 12/31/2018. The exploitation appears to be easy. The attack needs to be done within the local network. A single authentication is necessary for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1055 for this issue.

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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Vendor

• ZTE

Name

• ZX297520V3

Version

• 7520V3V1.0.0B09P27

License

• commercial

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CPE 2.2info

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