Cisco IOS XR Software contains a vulnerability that could allow an authenticated, remote attacker to cause a denial of service condition. Updates are available.
A vulnerability in the Simple Network Management Protocol (SNMP) module of Cisco IOS XR Software could allow an authenticated, remote attacker to cause a reload of the SNMP process on an affected device.
The vulnerability is due to improper processing of SNMP requests for certain MIBs. An attacker could exploit this vulnerability by sending an SNMP request for certain MIB objects. An exploit could allow the attacker to cause a reload of the SNMP process on an affected device.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco IOS XR Software Releases 4.3(.2) and 5.1 and were vulnerable. Later releases of Cisco IOS XR Software may also be vulnerable.
To exploit this vulnerability, the attacker must authenticate to the targeted device. This access requirement may reduce 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.
Cisco has released a security notice at the following link: CVE-2013-6700
Customers are advised to consult Cisco bug ID CSCuh43144 for the most complete list of affected product versions.
An authenticated, remote attacker could exploit this vulnerability to cause the SNMP process on an affected device to reload, resulting in a denial of service (DoS) condition.
The vulnerability is due to improper processing of SNMP requests for certain MIBs by the SNMP module of the affected software.
An attacker could exploit this vulnerability by sending an SNMP request for certain MIB objects. An exploit could allow the attacker to cause a reload of the SNMP process on an affected device, resulting in a DoS condition.
Administrators are advised to apply the appropriate updates
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.
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 email at firstname.lastname@example.org for assistance.
The security vulnerability applies to the following combinations of products.
Cisco IOS XR Software
4.3 .2 | 5.1 Base
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