Date: 15 February 2016
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AUSCERT External Security Bulletin Redistribution
Cisco Universal Small Cell Devices Unauthorized Firmware
15 February 2016
AusCERT Security Bulletin Summary
Product: Cisco Universal Small Cell Devices
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
CVE Names: CVE-2016-1321
Comment: AusCERT recommends administrators limit external network access to the
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Cisco Universal Small Cell Devices Unauthorized Firmware Retrieval
2016 February 12 20:50 GMT
Base - 5.0
No workarounds available
Cisco Bug IDs:
A vulnerability in Cisco Universal Small Cell devices could allow an
unauthenticated, remote attacker to retrieve firmware from a Cisco-hosted
The vulnerability is due to insufficient enforcement of the two-way
certificate validation process by the Cisco-hosted binary server to ensure
that only Cisco Universal Small Cell devices are able to download the firmware
images and service provider configuration hints file.
The hints file contains IP addresses of the device's provisioned service
provider Cisco Universal Small Cell RAN Management System. The binary images
retrieved from the image distribution service could be decrypted by an
attacker who has previously retrieved a valid key from the flash of a Cisco
Universal Small Cell device.
Workarounds that address this vulnerability are not available.
This advisory is available at the following link:
Cisco Universal Small Cell devices are vulnerable.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
Workarounds are not available.
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
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.
Version Description Section Status Date
1.0 Initial public release NA Final 2016-02-12
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A standalone copy or paraphrase of the text of this document that omits the
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contain factual errors. The information in this document is intended for end
users of Cisco products.
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