A vulnerability classified as problematic has been found in Cisco Unified IP Conference Station 7937G up to 1.4.5.7. Affected is an unknown part. The manipulation as part of a Crafted Packet leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

** UNSUPPORTED WHEN ASSIGNED ** A denial-of-service in Cisco Unified IP Conference Station 7937G 1-4-4-0 through 1-4-5-7 allows attackers restart the device remotely through sending specially crafted packets. Note: We cannot prove this vulnerability exists. Out of an abundance of caution, this CVE is being assigned to better serve our customers and ensure all who are still running this product understand that the product is end of life and should be removed or upgraded. For more information on this, and how to upgrade, refer to the CVE’s reference information.

The weakness was published 08/12/2020 by Cody Martin (debifrank) with Black Lantern Security (Website). The advisory is available at blacklanternsecurity.com. This vulnerability is traded as CVE-2020-16139 since 07/29/2020. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Cody Martin (debifrank) and been published even before and not after the advisory. The exploit is shared for download at github.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The real existence of this vulnerability is still doubted at the moment.

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

Similar entries are available at 159748 and 159749.

Productinfo

Vendor

• Cisco

Name

• Unified IP Conference Station 7937G

Version

• 1.4.5.0
• 1.4.5.1
• 1.4.5.2
• 1.4.5.3
• 1.4.5.4
• 1.4.5.5
• 1.4.5.6
• 1.4.5.7

License

• commercial

Support

• end of life

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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