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Category:   Device (Router/Bridge/Hub)  >   Cisco IOS Vendors:   Cisco
Cisco IOS/IOS XE ANI Packet Processing Flaw Lets Remote Users Cause the Target System to Crash
SecurityTracker Alert ID:  1038064
SecurityTracker URL:
CVE Reference:   CVE-2017-3849   (Links to External Site)
Date:  Mar 20 2017
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Cisco IOS and IOS XE. A remote user can cause the target system to reload.

A remote user on the local Layer 2 network can send a specially crafted Autonomic Networking Infrastructure (ANI) discovery packet to the target registrar device to cause the target device to reload.

If an ANI proxy is configured, the ANI proxy will forward the remote user's ANI discovery packet to the target registrar, allowing remote users that are not on the local network to exploit this flaw.

Systems configured as an autonomic registrar and with a configured whitelist are affected.

The vendor has assigned bug ID CSCvc42717 to this vulnerability.

Omar Eissa of ERNW reported this vulnerability (at the TROOPERS17 conference).

Impact:   A remote user on the local network can cause the target system to reload.
Solution:   The vendor has issued a fix.

The vendor advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Input validation error

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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