Cisco Security Advisory
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AV:N/AC:M/Au:N/C:P/I:N/A:N/E:F/RL:OF/RC:C
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Cisco IOS software contains a vulnerability that could allow an unauthenticated, remote attacker to access and disclose sensitive information.
The vulnerability is due to insecure handling of multicast network traffic. An unauthenticated, remote attacker could exploit the vulnerability by initiating a phone call to the affected system. The vulnerability could allow the attacker to monitor ongoing call information between peers when the call is placed on hold.
Cisco has confirmed the vulnerability and released updated software.
To successfully exploit the vulnerability, the attacker must join the voice call session. To achieve this objective, the attacker may require access to trusted, internal networks. This access limitation could limit the likelihood of a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
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Cisco has released release notes for Cisco bug ID CSCtx77750 at the following links: Cross-Platform Release Notes for Cisco IOS Release 15.1M&T and Cross-Platform Release Notes for Cisco IOS Release 15.2M&T
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Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor critical systems.
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Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.0 Initial Release NA Final 2012-Aug-23
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