Cisco confirms possibility of IOS rootkits

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Nov 8, 2006
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On the heels of an EUSecWest conference presentation on malicious rootkits for Cisco IOS (see background), Cisco's security response team has published a must-read document confirming that stealthy malware can be loaded on the software used on the vast majority of its routers and network switches.

Cisco warns:
It is possible that an attacker could insert malicious code into a Cisco IOS software image and load it onto a Cisco device that supports that image. This attack scenario could occur on any device that uses a form of software, given a proper set of circumstances.
The company’s confirmation follows a technical discussion by Core Security researcher Sebastian Muniz of “Da IOS Rootkit,” which is basically a binary modification to the IOS image downloaded from the device.

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