Cisco RF Gateway 1 TCP State Machine TCP Connection resource management

Summaryinfo

A vulnerability, which was classified as problematic, was found in Cisco RF Gateway 1. The impacted element is an unknown function of the component TCP State Machine. Executing a manipulation as part of TCP Connection can lead to resource management. This vulnerability appears as CVE-2017-12318. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic was found in Cisco RF Gateway 1 (affected version not known). This vulnerability affects some unknown functionality of the component TCP State Machine. The manipulation as part of a TCP Connection leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. CVE summarizes:

A vulnerability in the TCP state machine of Cisco RF Gateway 1 devices could allow an unauthenticated, remote attacker to prevent an affected device from delivering switched digital video (SDV) or video on demand (VoD) streams, resulting in a denial of service (DoS) condition. The vulnerability is due to a processing error with TCP connections to the affected device. An attacker could exploit this vulnerability by establishing a large number of TCP connections to an affected device and not actively closing those TCP connections. A successful exploit could allow the attacker to prevent the affected device from delivering SDV or VoD streams to set-top boxes. Cisco Bug IDs: CSCvf19887.

The bug was discovered 11/15/2017. The weakness was presented 11/16/2017 with Cisco as cisco-sa-20171115-rf-gateway-1 as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability was named CVE-2017-12318 since 08/03/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/07/2019).

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 $5k-$25k.

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 101854†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Cisco

Name

• RF Gateway 1

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Once again VulDB remains the best source for vulnerability data.

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