Cisco Security Advisory
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AV:N/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:U/RC:C
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A vulnerability in the network stack of Cisco Hosted Collaboration Mediation could allow an unauthenticated, remote attacker to cause excessive CPU utilization on the affected system.
The vulnerability is due to insufficient optimization of resources when the affected system is flooded with malformed UDP packets. An attacker could exploit this vulnerability by sending malformed UDP packets to UDP port 162 of the affected system. A successful exploit could allow the attacker to cause excessive CPU utilization on the affected system. CPU utilization returns to a normal state once the attack is terminated.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit this vulnerability, the attacker may need access to a trusted, internal network to send malformed UDP packets to the targeted device. This access requirement decreases the likelihood of a successful exploit.
Customers are advised to review the bug reports in the "Vendor Announcements" section for a current list of affected versions.
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 a security notice for bug ID CSCug85756 at the following link: CVE-2013-3381
Vulnerable Products
At the time this alert was first published, Cisco Hosted Collaboration Solution version 9 is affected. Later releases of Cisco Hosted Collaboration Solution may also be affected.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
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Software updates are not available.
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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 2013-Jun-12
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