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AUSCERT External Security Bulletin Redistribution
ESB-2015.3237
Cisco IOS XE Software Packet Processing Denial of Service Vulnerability
24 December 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco IOS XE
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-6431
Original Bulletin:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2015-1221-iosxe
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Cisco Security Advisory
Cisco IOS XE Software Packet Processing Denial of Service Vulnerability
Medium
Advisory ID:
cisco-sa-2015-1221-iosxe
Published:
2015 December 21 13:30 GMT
Version 1.0:
Final
CVSS Score:
Base - 6.1
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCux48405
CVE-2015-6431
CWE-399
Summary
Cisco IOS XE Software Release 16.1.1 contains a vulnerability that
could allow an unauthenticated, adjacent attacker to cause an affected
device to reload.
The vulnerability is due to incorrect processing of packets that have
a source MAC address of 0000:0000:0000. An attacker could exploit
this vulnerability by sending a frame that has a source MAC address
of all zeros to an affected device. A successful exploit could allow
the attacker to cause the device to reload.
Cisco has released software updates that address this
vulnerability. There are no workarounds that mitigate this vulnerability.
This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2015-1221-iosxe
Affected Products
Vulnerable Products
Cisco IOS XE Software Release 16.1.1 is vulnerable.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
vulnerability.
Workarounds
There are no workarounds that mitigate this vulnerability.
Fixed Software
When considering software upgrades, customers are advised to
consult the Cisco Security Advisories and Responses archive at
http://www.cisco.com/go/psirt and review subsequent advisories to
determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to upgrade
contain sufficient memory and confirm that current hardware and
software configurations will continue to be supported properly by the
new release. If the information is not clear, customers are advised to
contact the Cisco Technical Assistance Center (TAC) or their contracted
maintenance providers.
Exploitation and Public Announcements
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.
URL
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2015-1221-iosxe
Revision History
Version Description Section Status Date
1.0 Initial public release. - Final
2015-December-21
Legal Disclaimer
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE
DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO
RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits
the distribution URL is an uncontrolled copy and may lack important
information or contain factual errors. The information in this document
is intended for end users of Cisco products.
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