CVE-2017-6779: Multiple Cisco products are affected by a vulnerability in local file management for certain system log files of Cisco collaboration products that cou...

Description

Multiple Cisco products are affected by a vulnerability in local file management for certain system log files of Cisco collaboration products that could allow an unauthenticated, remote attacker to cause high disk utilization, resulting in a denial of service (DoS) condition. The vulnerability occurs because a certain system log file does not have a maximum size restriction. Therefore, the file is allowed to consume the majority of available disk space on the appliance. An attacker could exploit this vulnerability by sending crafted remote connection requests to the appliance. Successful exploitation could allow the attacker to increase the size of a system log file so that it consumes most of the disk space. The lack of available disk space could lead to a DoS condition in which the application functions could operate abnormally, making the appliance unstable. This vulnerability affects the following Cisco Voice Operating System (VOS)-based products: Emergency Responder, Finesse, Hosted Collaboration Mediation Fulfillment, MediaSense, Prime License Manager, SocialMiner, Unified Communications Manager (UCM), Unified Communications Manager IM and Presence Service (IM&P - earlier releases were known as Cisco Unified Presence), Unified Communication Manager Session Management Edition (SME), Unified Contact Center Express (UCCx), Unified Intelligence Center (UIC), Unity Connection, Virtualized Voice Browser. This vulnerability also affects Prime Collaboration Assurance and Prime Collaboration Provisioning. Cisco Bug IDs: CSCvd10872, CSCvf64322, CSCvf64332, CSCvi29538, CSCvi29543, CSCvi29544, CSCvi29546, CSCvi29556, CSCvi29571, CSCvi31738, CSCvi31741, CSCvi31762, CSCvi31807, CSCvi31818, CSCvi31823.

Metrics

EPSS Probability

1.98%

78.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Emergency Responder	>= 10.5, < 10.5\(1a\)
Cisco	Emergency Responder	>= 11.0, < 11.5\(4\)
Cisco	Emergency Responder	>= 12.0, < 12.0su1
Cisco	Emergency Responder	11.0\(1.10000.10\)
Cisco	Finesse	>= 11.5, < 11.5\(3\)
Cisco	Finesse	9.5\(1\)
Cisco	Hosted Collaboration Mediation Fulfillment	>= 11.5, < 11.5\(3\)
Cisco	Hosted Collaboration Mediation Fulfillment	9.5\(1\)
Cisco	Mediasense	>= 11.5, < 11.5su2
Cisco	Mediasense	9.5\(1\)
Cisco	Prime Collaboration Assurance	>= 11.6, < 11.6_es16
Cisco	Prime Collaboration Assurance	>= 12.1, < 12.1_es2
Cisco	Prime Collaboration Provisioning	12.5
Cisco	Prime License Manager	>= 10.5, < 10.5.2
Cisco	Prime License Manager	>= 11.0, < 11.5\(1\)su5
Cisco	Socialminer	>= 11.6, < 11.6.1
Cisco	Unified Communications Manager	>= 10.0, < 10.5\(2\)su5
Cisco	Unified Communications Manager	>= 11.0, < 11.0\(1a\)su4
Cisco	Unified Communications Manager	>= 11.5, < 11.5\(1\)su3
Cisco	Unified Communications Manager	10.5\(2.10000.5\)
Cisco	Unified Communications Manager	11.0\(1.10000.10\)
Cisco	Unified Communications Manager	11.5\(1.10000.6\)
Cisco	Unified Communications Manager	12.0
Cisco	Unified Contact Center Express	>= 11.6, < 11.6\(1\)
Cisco	Unified Contact Center Express	9.0\(2\)su1.3
Cisco	Unified Intelligence Center	>= 11.6, < 11.6\(1\)
Cisco	Unified Intelligence Center	9.5\(1\)
Cisco	Unity Connection	>= 10.5, < 10.5su5
Cisco	Unity Connection	>= 11.0, < 11.5.1su3
Cisco	Unity Connection	9.5\(0.9\)tt0
Cisco	Unity Connection	12.0
Cisco	Virtualized Voice Browser	>= 11.6, < 11.6\(1\)

References

Timeline

Published: Jun 7, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6779?

Multiple Cisco products are affected by a vulnerability in local file management for certain system log files of Cisco collaboration products that could allow an unauthenticated, remote attacker to cause high disk utilization, resulting in a denial of service (DoS) condition. The vulnerability occurs because a certain system log file does not have a maximum size restriction. Therefore, the file is allowed to consume the majority of available disk space on the appliance. An attacker could exploit this vulnerability by sending crafted remote connection requests to the appliance. Successful exploitation could allow the attacker to increase the size of a system log file so that it consumes most of the disk space. The lack of available disk space could lead to a DoS condition in which the application functions could operate abnormally, making the appliance unstable. This vulnerability affects the following Cisco Voice Operating System (VOS)-based products: Emergency Responder, Finesse, Hosted Collaboration Mediation Fulfillment, MediaSense, Prime License Manager, SocialMiner, Unified Communications Manager (UCM), Unified Communications Manager IM and Presence Service (IM&P - earlier releases were known as Cisco Unified Presence), Unified Communication Manager Session Management Edition (SME), Unified Contact Center Express (UCCx), Unified Intelligence Center (UIC), Unity Connection, Virtualized Voice Browser. This vulnerability also affects Prime Collaboration Assurance and Prime Collaboration Provisioning. Cisco Bug IDs: CSCvd10872, CSCvf64322, CSCvf64332, CSCvi29538, CSCvi29543, CSCvi29544, CSCvi29546, CSCvi29556, CSCvi29571, CSCvi31738, CSCvi31741, CSCvi31762, CSCvi31807, CSCvi31818, CSCvi31823.

How severe is CVE-2017-6779?

Severity scoring for CVE-2017-6779 is pending analysis. The EPSS model estimates a 1.98% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6779?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.