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Category:   Device (Router/Bridge/Hub)  >   Cisco Carrier Routing System Vendors:   Cisco
Cisco Carrier Routing System Bugs Let Remote Users Deny Service
SecurityTracker Alert ID:  1027006
SecurityTracker URL:
CVE Reference:   CVE-2011-3283, CVE-2011-3295   (Links to External Site)
Date:  May 2 2012
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Cisco Carrier Routing System. A remote user can cause denial of service conditions.

A remote user can send specially crafted network traffic to trigger a flaw in the NETIO and IPV4_IO processes and cause excessive CPU consumption on the target device [CVE-2011-3295]. Cisco has assigned Bug ID CSCti59888 to this vulnerability.

A remote user can send a specially crafted fragmented GRE packet to cause the Metro subsystem crash [CVE-2011-3283]. Cisco has assigned Bug ID CSCts14887 to this vulnerability.

Impact:   A remote user can cause excessive CPU consumption on the target system.

A remote user can cause the Metro subsystem crash.

Solution:   The vendor has issued a fix.

The vendor's advisories are available at:

Vendor URL: (Links to External Site)
Cause:   Not specified
Underlying OS:  

Message History:   None.

 Source Message Contents

Date:  Wed, 02 May 2012 21:33:24 +0000
Subject:  Cisco Carrier Routing System

<item type="CAN" name="CVE-2011-3283" seq="2011-3283">
<phase date="20110829">Assigned</phase>
<desc>Cisco Carrier Routing System 3.9.1 allows remote attackers to cause a denial of service (Metro subsystem crash) via a fragmented GRE packet, aka Bug ID CSCts14887.</desc>
<ref source="CONFIRM" url=";softwareid=280867577&amp;release=3.9.1">;softwareid=280867577&amp;release=3.9.1</ref>

<item type="CAN" name="CVE-2011-3295" seq="2011-3295">
<phase date="20110829">Assigned</phase>
<desc>The NETIO and IPV4_IO processes in Cisco IOS XR 3.8 through 4.1, as used in Cisco Carrier Routing System and other products, allow remote attackers to cause a denial of service (CPU consumption) via crafted network traffic, aka Bug ID CSCti59888.</desc>
<ref source="CONFIRM" url=";reltype=all&amp;relind=AVAILABLE&amp;release=3.9.2&amp;softwareid=280867577&amp;sortparam=7">;reltype=all&amp;relind=AVAILABLE&amp;release=3.9.2&amp;softwareid=280867577&amp;sortparam=7</ref>


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