October 2, 2019
Multiple Cisco Unified Communications Products are prone to a cross-site scripting vulnerability because they fail to sanitize user-supplied input. An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks. This issue is being tracked by Cisco bug IDs CSCvp14284, CSCvq12061 and CSCvq13816.
- Cisco Unified Communications Manager 10.5(2)
- Cisco Unified Communications Manager 11.5(1)SU5
- Cisco Unified Communications Manager 12.5(1)
- Cisco Unified Communications Manager IM and Presence Service 11.5(1)SU5
- Cisco Unified Communications Manager IM and Presence Service 12.5(1)
- Cisco Unified Communications Manager Session Management Edition (SME) 10.5(2)
- Cisco Unified Communications Manager Session Management Edition (SME) 11.5(1)SU5
- Cisco Unified Communications Manager Session Management Edition (SME) 12.5(1)
- Cisco Unity Connection 11.5(1)SU5
- Cisco Unity Connection 12.5(1)
Block external access at the network boundary, unless external parties require service.
If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to detect and block attacks and anomalous activity such as requests containing suspicious URI sequences. Since the webserver may log such requests, review its logs regularly.
Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.
Since exploiting cross-site scripting issues often requires malicious script code to run in browsers, consider disabling script code and active content support within a client browser as a way to prevent a successful exploit. Note that this mitigation tactic might adversely affect legitimate sites that rely on the execution of browser-based script code.
Updates are available. Please see the references or vendor advisory for more information.
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