CVE-2017-6791 Denial of service in Cisco Unified Communications Manager

High 7.5 Published 7 Sep 2017 Updated 5 Aug 2024

Unauthenticated remote attackers can cause a denial of service in Cisco Unified Communications Manager by sending incomplete TLS traffic streams.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2017-6791?

CVE-2017-6791 is a high-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 7 Sep 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-119

Which versions are affected by CVE-2017-6791?

It affects 1 product.

Products include Cisco Unified Communications Manager.

How do I fix CVE-2017-6791?

No fix has been published for CVE-2017-6791 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2017-6791 being exploited?

There is no known exploitation of CVE-2017-6791 in the wild and no public exploit code.

All Cisco Unified Communications Manager vulnerabilities

Sources

Also known as GHSA-5qmr-j946-m785.