SCALANCE X300/X408/X414 V4.0.0) Web Interface Crafted Packet input validation

Summaryinfo

A vulnerability was found in SCALANCE X300, X408 and X414 V4.0.0). It has been classified as problematic. Affected is an unknown function of the component Web Interface. The manipulation as part of Crafted Packet leads to input validation. This vulnerability is uniquely identified as CVE-2018-13807. The attack is possible to be carried out remotely. No exploit exists. It is recommended to apply restrictive firewalling.

Detailsinfo

A vulnerability was found in SCALANCE X300, X408 and X414 V4.0.0). It has been rated as problematic. This issue affects an unknown code block of the component Web Interface. The manipulation as part of a Crafted Packet leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

A vulnerability has been identified in SCALANCE X300 (All versions < V4.0.0), SCALANCE X408 (All versions < V4.0.0), SCALANCE X414 (All versions). The web interface on port 443/tcp could allow an attacker to cause a Denial-of-Service condition by sending specially crafted packets to the web server. The device will automatically reboot, impacting network availability for other devices. An attacker must have network access to port 443/tcp to exploit the vulnerability. Neither valid credentials nor interaction by a legitimate user is required to exploit the vulnerability. There is no confidentiality or integrity impact, only availability is temporarily impacted. This vulnerability could be triggered by publicly available tools.

The bug was discovered 09/11/2018. The weakness was disclosed 09/12/2018 (Website). It is possible to read the advisory at cert-portal.siemens.com. The identification of this vulnerability is CVE-2018-13807 since 07/10/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

Addressing this vulnerability is possible by firewalling tcp/443 (https).

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 105331†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• SCALANCE

Name

• X300
• X408
• X414

Version

• V4.0.0)

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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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