Cisco Security Advisory
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CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
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A vulnerability in Cisco Aironet 1830 Series and Cisco Aironet 1850 Series Access Points running Cisco Mobility Express Software could allow an unauthenticated, remote attacker to take complete control of an affected device.
The vulnerability is due to the existence of default credentials for an affected device that is running Cisco Mobility Express Software, regardless of whether the device is configured as a master, subordinate, or standalone access point. An attacker who has layer 3 connectivity to an affected device could use Secure Shell (SSH) to log in to the device with elevated privileges. A successful exploit could allow the attacker to take complete control of the device.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170405-ame
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Vulnerable Products
This vulnerability affects Cisco Aironet 1830 Series and Cisco Aironet 1850 Series Access Points that are running an 8.2.x release of Cisco Mobility Express Software prior to Release 8.2.121.0, regardless of whether the device is configured as a master, subordinate, or standalone access point. Release 8.2 was the first release of Cisco Mobility Express Software for next generation Cisco Aironet Access Points.
To determine which release of Cisco Mobility Express Software is running on a device, administrators can use the Cisco Mobility Express wireless controller web interface or the CLI.
To use the web interface, log in to the web interface, choose Management > Software Update, and then refer to the release number that appears at the top of the page.
To use the CLI, issue the show version command, and then refer to the output of the command. The following example shows the output of the command for a Cisco Aironet 1852i Access Point that is running Cisco Mobility Express Software Release 8.3.111.0:
The device is not affected by this vulnerability.AP# show version cisco AIR-AP1852I-UXK9 ARMv7 Processor rev 0 (v71) with 997184/525160K bytes of memory. Processor board ID RFDP2BCR021 AP Running Image : 8.3.111.0 Primary Boot Image : 8.3.111.0 Backup Boot Image : 8.1.106.33 AP Image type : MOBILITY EXPRESS IMAGE AP Configuration : MOBILITY EXPRESS CAPABLE . . .Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this vulnerability.
Cisco has confirmed that this vulnerability does not affect Cisco Aironet Access Points running Cisco Lightweight Access Point (AP) Software or Cisco IOS Software.
Cisco has also confirmed that this vulnerability does not affect the following Cisco products:
- Aironet 2800 Series Access Points running Cisco Mobility Express Software
- Aironet 3800 Series Access Points running Cisco Mobility Express Software
- Wireless controllers, any Cisco model
- Wireless LAN controllers, any Cisco model
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There are no workarounds that address this vulnerability.
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Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.htmlAdditionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.
When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, 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.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.htmlCustomers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.
Fixed Releases
Customers should upgrade to an appropriate release as indicated in the table in this section. To help ensure a complete upgrade solution, consider that this advisory is part of a collection that includes the following advisories:
- cisco-sa-20170405-ame: Cisco Aironet 1830 Series and 1850 Series Access Points Mobility Express Default Credential Vulnerability
- cisco-sa-20170405-wlc: Cisco Wireless LAN Controller 802.11 WME Denial of Service Vulnerability
- cisco-sa-20170405-wlc2: Cisco Wireless LAN Controller IPv6 UDP Denial of Service Vulnerability
- cisco-sa-20170405-wlc3: Cisco Wireless LAN Controller Management GUI Denial of Service Vulnerability
In the following table, the left column lists major releases of Cisco software. The center column indicates whether a major release is affected by the vulnerability described in this advisory and the first minor release that includes the fix for this vulnerability. The right column indicates whether a major release is affected by all the vulnerabilities described in this collection of advisories and the current recommended release for those vulnerabilities.Cisco Mobility Express Software Major Release First Fixed Release for This Vulnerability First Fixed Release for All Vulnerabilities Described in the Collection of Advisories Prior to 8.0 Not vulnerable 8.0.140.0 8.0 Not vulnerable 8.0.140.0 8.1 Not vulnerable 8.2.130.0 8.2 8.2.121.0 8.2.141.0 8.3 Not vulnerable 8.3.112.0 8.4 Not vulnerable 8.4.100.0 (future release)
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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.
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This issue was discovered by the Cisco TAC during the resolution of a customer support case.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.4 Metadata update. — Final 2017-September-21 1.3 Metadata update. — Final 2017-September-13 1.2 Metadata update. — Final 2017-September-11 1.1 Updated first fixed software release for 8.2 from 8.2.111.0 to 8.2.121.0. Vulnerable Products and Fixed Software. Final 2017-May-30 1.0 Initial public release. — Final 2017-April-05
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