Cisco Security Advisory
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AV:L/AC:L/Au:N/C:N/I:C/A:N/E:F/RL:OF/RC:C
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A vulnerability in the TFTP implementation of the Cisco Small Business SPA30X and SPA50X IP Phones could allow an unauthenticated, local attacker to load arbitrary firmware images onto the affected device.
The vulnerability is due to insufficient file integrity checks of the firmware image. An attacker could exploit this vulnerability by gaining access to the local shell of the device and loading an arbitrary firmware image onto 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: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151209-ipp
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There are no workarounds that address this vulnerability.
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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.
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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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Cisco would like to thank security researcher Chris Watts for discovering and reporting this vulnerability.
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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 1.0 Initial public release — Final 2015-December-09
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