Vulnerability Alert

Cisco NX-OS igmp_snoop_orib_fill_source_update() Function Remote Denial of Service Vulnerability

 
Threat Type:CWE-119: Buffer Errors
IntelliShield ID:26613
Version:1
First Published:2012 August 10 21:27 GMT
Last Published:2012 August 10 21:27 GMT
Port: Not available
CVE:CVE-2012-1357
BugTraq ID:54825
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:5.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.7
 
Version Summary:Cisco NX-OS contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition on a targeted device. Updates are available.
 
 
Description
Cisco NX-OS contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted device.

The vulnerability is due to improper processing of certain packets by the affected devices. An unauthenticated, remote attacker could exploit this vulnerability by sending crafted packets to the targeted device. Successful exploitation could allow the attacker to cause a DoS condition on the targeted device.

Cisco has confirmed this vulnerability and has released updated software.
 
Warning Indicators
Cisco NX-OS versions 5.0 and 5.1 running on Cisco Nexus 2000 Series and Cisco Nexus 5000 Series switches are vulnerable.
 
IntelliShield Analysis
In typical network configuration, the vulnerable devices are behind a firewall. To exploit this vulnerability, an attacker must have access to the internal network to send crafted packets to the vulnerable devices. This access requirement could limit the likelihood of a successful exploit.
 
Vendor Announcements
Cisco has released a release note enclosure for Cisco bug ID CSCts46521 at the following link: NX-OS Release 5.1(3)N1(1a)
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to reload the targeted device, resulting in a DoS condition.
 
Technical Information
The vulnerability is due to improper processing of certain Internet Group Management Protocol (IGMP) packets by the igmp_snoop_orib_fill_source_update() function.

An unauthenticated, remote attacker could exploit this vulnerability by sending crafted IGMP packets to the targeted devices. Processing such packets could cause the attacker to remotely reload the device, resulting in a DoS condition.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

Administrators are advised to monitor affected systems.
 
Patches/Software
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 e-mail at tac@cisco.com.
 
Alert History
 
Initial Release


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
N/A

Associated Products:
N/A




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The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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