Cisco Webex for BroadWorks Credential Exposure Vulnerability

A low-severity vulnerability in Cisco Webex for BroadWorks Release 45.2 could allow an unauthenticated, remote attacker to access data and credentials if unsecure transport is configured for the SIP communication.

This vulnerability and the related issue affect Cisco Webex for BroadWorks if it is running in a Windows environment. If Cisco Webex for BroadWorks is not running in a Windows environment, it is not affected by this vulnerability.

This vulnerability is due to the exposure of sensitive information in the SIP headers.

A related issue could allow an authenticated user to access credentials in plain text in the client and server logs.

A malicious actor could exploit this vulnerability and the related issue to access data and credentials and impersonate the user.

A configuration change to fix this vulnerability and the related issue has been pushed to Cisco Webex for BroadWorks. Cisco recommends that customers restart their Cisco Webex application to apply the configuration changes.

There is a workaround that addresses this vulnerability and the related issue.

There is a workaround that addresses this vulnerability and the related issue.

Administrators can configure secure transport for SIP communication to encrypt data that is in transit to prevent this vulnerability. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions.

Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.

Cisco has pushed fixes to Cisco Webex for BroadWorks Release 45.2. Cisco recommends restarting the application to apply the configuration changes.Cisco also recommends rotating credentials to protect against the possibility that the credentials have been acquired by a malicious actor.

This vulnerability was found during the resolution of a Cisco TAC support case.

This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-credexp-xMN85y6