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 web framework of Cisco Unified Presence could allow an unauthenticated, remote attacker to cause an increase in memory utilization.
The vulnerability is due to improper handling of memory allocation when the affected system is flooded with malformed TCP packets. An attacker could exploit this vulnerability by sending malformed TCP packets to the affected system. An exploit could allow the attacker to cause an increase in memory utilization. Memory utilization does not return to a normal state when the attack is terminated. A reboot is of the system is required to restore free memory.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit the vulnerability, an attacker would likely need access to an internal, trusted network to send malformed TCP packets to the targeted system, decreasing the likelihood of a successful exploit.
Customers are advised to review the bug report 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 CSCug38080 at the following link: CVE-2013-1242
Vulnerable Products
At the time this alert was first published, Cisco Unified Presence versions 9.5 and prior were vulnerable. Later versions of Cisco Unified Presence 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 can help protect affected systems from external attacks by using a solid firewall strategy.
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-May-10
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