Cisco Security Advisory
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AV:N/AC:L/Au:S/C:N/I:N/A:P/E:F/RL:OF/RC:C
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A vulnerability in the SNMP module of Cisco IOS XR could allow an authenticated, remote attacker to trigger a memory leak in the SNMP process.
The vulnerability is due to insufficient checking of data input. An attacker could exploit this vulnerability by sending crafted SNMP packets to the device. An exploit could allow the attacker to cause a memory leak in the SNMP process. The SNMP process will restart after it consumes its allocated memory.
Cisco has confirmed the vulnerability in a security notice and software updates are available.
To exploit this vulnerability, the attacker must authenticate to a targeted device to send crafted SNMP packets. This access requirement limits the possibility 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 CSCue31546 at the following link: CVE-2013-1216
Vulnerable Products
At the time this alert was first published, Cisco IOS XR Software versions 4.3 and prior were vulnerable. Later versions of Cisco IOS XR Software 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 apply the appropriate updates.
It is critical to prevent unauthorized direct communication to network devices. Restrict network traffic destined for the network infrastructure to protect against reconnaissance and DoS attacks. For configuration details, consult Protecting Your Core: Infrastructure Protection Access Control Lists.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to monitor affected systems.
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Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com for assistance.
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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-Apr-26
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