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Cisco has alerted customers about a vulnerability in Webex for BroadWorks that could allow unauthorized attackers to access credentials remotely.
Webex for BroadWorks combines Cisco Webex’s video conferencing and collaboration tools with the BroadWorks unified communications platform.
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Cisco has not assigned a CVE ID for a security issue but announced in a Tuesday advisory that it has implemented a configuration change to fix the flaw. Customers are advised to restart their Cisco Webex app to apply the update.
“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,” Cisco explained.
“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.”
The vulnerability arises from sensitive information in SIP headers and affects Cisco BroadWorks (on-premises) and Cisco Webex for BroadWorks (hybrid cloud/on-premises) systems on Windows.
Workaround available:
The company suggests that admins set up secure transport for SIP communication to encrypt data temporarily until the configuration change is applied.
“Cisco also recommends rotating credentials to protect against the possibility that the credentials have been acquired by a malicious actor,” the company added.
The Product Security Incident Response Team (PSIRT) has found no evidence of malicious use or any public announcements about this vulnerability.
