A vulnerability in Cisco Catalyst 4500 Series Switches running Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.
The vulnerability is due to improper processing of valid crafted Cisco Discovery Protocol packets. An attacker could exploit this vulnerability by sending crafted Cisco Discovery Protocol packets to be processed by an affected device. An exploit could allow the attacker to cause the software to stop functioning properly, resulting in a DoS condition on the affected device.
Cisco has confirmed the vulnerability and released software updates.
To exploit this vulnerability, an attacker may need to acquire additional information about the targeted device, such as whether the device is configured to process Cisco Discovery Protocol packets. A device configured to process these packets is required for a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
Cisco has released bug ID CSCuu25770 for registered users, which contains additional details and an up-to-date list of affected product versions.
Vulnerable ProductsAt the time this alert was first published, Cisco IOS XE Software Releases 3.6(2)E and prior and Cisco IOS Software Releases 15.2(3)E and prior were vulnerable. Later releases may also be vulnerable.
Products Confirmed Not VulnerableNo other Cisco products are currently known to be affected by these vulnerabilities.
Administrators are advised to apply the appropriate updates.
Administrators are advised to monitor affected systems.
Administrators are advised to configure no cdp tlv app or no cdp enable on physical ports.
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 email at email@example.com.
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.
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.
Version Description Section Status Date 1.0 Initial Release NA Final 2015-Sep-16
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