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AUSCERT External Security Bulletin Redistribution
ESB-2013.0164
Cisco NX-OS High Availability Policy Remote Denial of Service Vulnerability
7 February 2013
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AusCERT Security Bulletin Summary
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Product: Cisco NX-OS
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2012-2469
Original Bulletin:
http://tools.cisco.com/security/center/viewAlert.x?alertId=26619
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Cisco NX-OS High Availability Policy Remote Denial of Service Vulnerability
Threat Type: CWE-399: Resource Management Errors
IntelliShield ID: 26619
Version: 1
First Published: February 05, 2013 09:48 AM EST
Last Published: February 05, 2013 09:48 AM EST
Vector: Adjacent Network
Authentication: None
Exploit: Functional
Port: Not Available
CVE: CVE-2012-2469
BugTraq ID: 54833
Urgency: Unlikely Use
Credibility: Confirmed
Severity: Mild
CVSS Base: 6.1
CVSS Temporal: 5.0
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 system. 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 system.
The vulnerability is due to improper handling of Cisco Discovery Protocol
packets by the affected software. An unauthenticated, remote attacker could
exploit this vulnerability by sending crafted Cisco Discovery Protocol packets
to the targeted system. When the packets are processed, the attacker could
reset the device remotely, resulting in a DoS condition.
Cisco has confirmed this vulnerability and released updated software.
Warning Indicators
Cisco NX-OS versions 4.2, 5.0, 5.1, and 5.2 running on the Cisco Nexus 7000
series switches are vulnerable.
IntelliShield Analysis
This vulnerability is exploitable only on systems that have the High
Availability policy configured for Reset.
Vendor Announcements
Cisco has released a release note enclosure for Cisco bugID CSCtk34535
http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtk34535
and CSCtk19132
http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtk19132
at the following link: Cisco Nexus 7000 Series NX-OS Release 5.2
http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/release/notes/52_nx-os_release_note.html
Impact
An unauthenticated, remote attacker could exploit this vulnerability to
cause a device reset, resulting in a DoS condition.
Technical Information
Technical details are not available.
Safeguards
Administrators are advised to apply the appropriate updates.
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.
Patches/Software
Cisco customers with active contracts can obtain updates
through the Software Center at the following link:
http://www.cisco.com/cisco/software/navigator.html?a=a&i=rpm
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:
Cisco Cisco NX-OS 4.2 (1)SV1(5.2), (2), (3), (4), (5), .1, 2(1)SV1(4), Base
Software | 5.0 (0.54) , (3), (4), (5), (6), Base | 5.1 Base | 5.2(1) Base
Associated Products:
N/A
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LEGAL DISCLAIMER 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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