Cisco Aironet 1800 Series Access Point Denial of Service Vulnerability

Summary

• A vulnerability in the IP ingress packet handler of Cisco Aironet 1800 Series Access Point devices could allow an unauthenticated, remote attacker to cause a complete denial of service (DoS) condition.
  
  The vulnerability is due to improper input validation of IP packet headers. An attacker could exploit this vulnerability by sending a crafted IP packet to an affected device. An successful exploit could allow the attacker to cause the device to reload unexpectedly.
  
  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-20160113-aironet

Affected Products

• Vulnerable Products

  The following Cisco products are vulnerable:

  • Cisco Aironet 1830e Series Access Point
  • Cisco Aironet 1830i Series Access Point
  • Cisco Aironet 1850e Series Access Point
  • Cisco Aironet 1850i Series Access Point

  Products Confirmed Not Vulnerable

  Cisco Wireless LAN Controllers (WLC) may contain vulnerable Cisco Aironet software; however, a Cisco WLC is not affected by this vulnerability.
  
  No other Cisco products, including Cisco Meraki products, are currently known to be affected by this vulnerability.

Indicators of Compromise

• An exploit of this vulnerability could cause the device to reload and create a core file. To determine whether the device has been affected by this vulnerability, the Cisco Technical Assistance Center (TAC) can review the core file.

Workarounds

• There are no workarounds that address this vulnerability.

Fixed Software

• When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices 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.
  This advisory has the following companion advisory cisco-sa-20160113-air. To address the vulnerability that is described in this and the companion advisory, customers should upgrade to Cisco Aironet 1800 Series Access Point software release 8.1.131.0 or later on affected devices.
  

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.
  

Source

• This vulnerability was found during Cisco internal quality assurance testing.

URL

• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160113-aironet

Revision History

• Version	Description	Section	Status	Date
  1.0	Initial public release.	-	Final	2016-January-13

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