Cisco Unified Communications Manager 10.0(1.10000.24) Trust Verification Service data processing

Summaryinfo

A vulnerability was found in Cisco Unified Communications Manager 10.0(1.10000.24) and classified as problematic. This impacts an unknown function of the component Trust Verification Service. The manipulation results in data processing. This vulnerability is identified as CVE-2017-6791. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in Cisco Unified Communications Manager 10.0(1.10000.24) (Unified Communication Software). Affected is an unknown code of the component Trust Verification Service. The manipulation with an unknown input leads to a data processing vulnerability. CWE is classifying the issue as CWE-19. This is going to have an impact on availability. CVE summarizes:

A vulnerability in the Trust Verification Service (TVS) of Cisco Unified Communications Manager could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of Transport Layer Security (TLS) traffic by the affected software. An attacker could exploit this vulnerability by generating incomplete traffic streams. A successful exploit could allow the attacker to deny access to the TVS for an affected device, resulting in a DoS condition, until an administrator restarts the service. Known Affected Releases 10.0(1.10000.24) 10.5(2.10000.5) 11.0(1.10000.10) 9.1(2.10000.28). Cisco Bug IDs: CSCux21905.

The bug was discovered 09/06/2017. The weakness was released 09/07/2017 (Website). The advisory is shared for download at quickview.cloudapps.cisco.com. This vulnerability is traded as CVE-2017-6791 since 03/09/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit 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 $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316140 (Cisco Unified Communications Manager Trust Verification Service Denial of Service Vulnerability (cisco-sa-20170906-ucm)).

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 100662†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Unified Communication Software

Vendor

• Cisco

Name

• Unified Communications Manager

Version

• 10.0(1.10000.24)

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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