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AUSCERT External Security Bulletin Redistribution
ESB-2015.2705
Cisco ASR 5000 CDMA PMIpv6 Denial of Service Vulnerability
28 October 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco ASR 5000 Series Routers
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-6340
Original Bulletin:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151016-asrcdma
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Cisco Security Advisory
Cisco ASR 5000 CDMA PMIpv6 Denial of Service Vulnerability
Medium
Advisory ID: cisco-sa-20151016-asrcdma
Published: 2015 October 19 00:00 GMT
Version 1.0: Final
CVSS Score:
Base - 5.0
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCuv63280
CVE-2015-6340
CWE-119
Summary
A vulnerability in the Proxy Mobile IPv6 (PMIPv6) protocol implementation of
the Cisco Aggregation Services Router (ASR) ASR 5000 for Cisco Code Division
Multiple Access (CDMA) System Software could allow an unauthenticated, remote
attacker to cause a partial denial of service (DoS) condition due to the hamgr
process restarting.
The vulnerability is due to improper input validation of the PMIPv6 packet
header. An attacker could exploit this vulnerability by sending a crafted
PMIPv6 packet to the device. A successful exploit could allow the attacker to
cause a partial DoS condition because the hamgr process could restart when
parsing the crafted PMIPv6 packet.
Cisco has released software updates that address this vulnerability.
Workarounds that mitigate these vulnerabilities not are available.
This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151016-asrcdma
Affected Products
Vulnerable Products
Cisco Aggregation Services Router (ASR) ASR 5000 version 19.0.MO.60737 for
Cisco Code Division Multiple Access (CDMA) is vulnerable.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
vulnerability.
Indicators of Compromise
The ASR5K will write out a core file for the hamgr process. This can be viewed
via the following Command Line Interface (CLI) command:
# show crash <#>
=== ==================== ======== ========== =============== =======================
# Time Process Card/CPU/ SW HW_SER_NUM
PID VERSION MIO / Crash Card
=== ==================== ======== ========== =============== =======================
1 2010-Feb-16+07:56:37 hamgr 05/0/15340 19.0.M0.61045 #######################
Please contact the Cisco Technical Assistance Center (TAC) to review the core
file and confirm if the core file shows that the device has been compromised
by this vulnerability.
Workarounds
Workarounds are not available.
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 be upgraded 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-20151016-asrcdma
Revision History
Version Description Section Status Date
1.0 Initial public release. Final 2015-October-19
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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