Cisco IOS contains a flaw that may lead to an unauthorized information disclosure. The issue is triggered by an unspecified error in the Multicast Music-on-Hold (MMoH) feature, which may allow a remote attacker to listen in on a PSTN Call. This may allow the attacker to gain access to potentially sensitive crosstalk information.
Remote / Network Access
Loss of Confidentiality
Upgrade to version 15.1(3)T4 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.