A vulnerability classified as critical has been found in Sierra Wireless AirLink ES450 4.9.3. Affected is an unknown part of the file upload.cgi of the component Webserver. The manipulation as part of a HTTP Request leads to a unrestricted upload vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An exploitable remote code execution vulnerability exists in the upload.cgi functionality of Sierra Wireless AirLink ES450 FW 4.9.3. A specially crafted HTTP request can upload a file, resulting in executable code being uploaded, and routable, to the webserver. An attacker can make an authenticated HTTP request to trigger this vulnerability.

The bug was discovered 04/25/2019. The weakness was shared 05/06/2019 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2018-4063 since 01/02/2018. It is possible to launch the attack remotely. A authentication is necessary for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1608.002.

The vulnerability was handled as a non-public zero-day exploit for at least 11 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-134422, VDB-134423, VDB-134425 and VDB-134426 are related to this item.

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Vendor

• Sierra Wireless

Name

• AirLink ES450

Version

• 4.9.3

License

• commercial

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CPE 2.2info

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