Cisco Security Advisory: Cisco IOS and IOS XE Software Smart Install Memory Leak Vulnerability

[Cisco Systems Product Security Incident Response Team <psirt@xxxxxxxxx>]

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Cisco Security Advisory: Cisco IOS and IOS XE Software Smart Install Memory 
Leak Vulnerability

Advisory ID:  cisco-sa-20160928-smi

Revision: 1.0

For Public Release: 2016 September 28 16:00  GMT

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Summary
=======

The Smart Install client feature in Cisco IOS and IOS XE Software contains a 
vulnerability that could allow an unauthenticated, remote attacker to cause a 
memory leak and eventual denial of service (DoS) condition on an affected 
device.

The vulnerability is due to incorrect handling of image list parameters. An 
attacker could exploit this vulnerability by sending crafted Smart Install 
packets to TCP port 4786. A successful exploit could cause a Cisco Catalyst 
switch to leak memory and eventually reload, resulting in a DoS condition.

Cisco has released software updates that address this vulnerability. There are 
no workarounds that address this vulnerability other than disabling Smart 
Install functionality on the affected device.

This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-smi

This advisory is part of the September 28, 2016, release of the Cisco IOS and 
IOS XE Software Security Advisory Bundled Publication, which includes 10 Cisco 
Security Advisories that describe 11 vulnerabilities. All the vulnerabilities 
have a Security Impact Rating of High. For a complete list of the advisories 
and links to them, see Cisco Event Response: September 2016 Semiannual Cisco 
IOS and IOS XE Software Security Advisory Bundled Publication.

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