A vulnerability was found in Cisco ASA NGFW (Firewall Software) (affected version not known) and classified as critical. Affected by this issue is some unknown functionality of the component Device Initialization. The manipulation with an unknown input 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 confidentiality, integrity, and availability. CVE summarizes:

A vulnerability exists in the process of creating default IP blocks during device initialization for Cisco ASA Next-Generation Firewall Services that could allow an unauthenticated, remote attacker to send traffic to the local IP address of the device, bypassing any filters that are configured to deny local IP management traffic. The vulnerability is due to an implementation error that exists in the process of creating default IP blocks when the device is initialized, and the way in which those IP blocks interact with user-configured filters for local IP management traffic (for example, SSH to the device). An attacker could exploit this vulnerability by sending traffic to the local IP address of the targeted device. A successful exploit could allow the attacker to connect to the local IP address of the device even when there are filters configured to deny the traffic. Cisco Bug IDs: CSCvd97962.

The bug was discovered 11/15/2017. The weakness was shared 11/16/2017 with Cisco as cisco-sa-20171115-firepower1 as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is handled as CVE-2017-12299 since 08/03/2017. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 01/23/2021).

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 $25k-$100k.

Addressing this vulnerability is possible by firewalling .

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Type

• Firewall Software

Vendor

• Cisco

Name

• ASA NGFW

License

• commercial

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CPE 2.2info

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