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IT Security Feb 14, 2020

CDPwn - Get help now.

In early February Armis discovered a weak spot known as "CDPwn" in the Cisco Discovery Protocol (CDP). Cisco released a series of updates shortly thereafter to close the discovered leak on several devices.

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Timo Seiler
Account Manager

CDP is a protocol (Layer 2) developed by Cisco which allows the discovery and direct communication of different devices of the manufacturer in the network.

 

The following device groups are affected:

Heap Overflow in Cisco IP Cameras (CVE-2020-3110)
Stack Overflow in Cisco VoIP Devices (CVE-2020-3111)

 

Format String Stack Overflow (CVE-2020-3118)
Stack overflow and arbitrary write access (CVE-2020-3119)
Denial of Service (CVE-2020-3120) in NX-OS switches and IOS XR routers

 

The security gap could be used to bypass network quarantines and run malicious software. To do this, however, the attacker must already be present in the network.

 

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