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Category:   Device (Router/Bridge/Hub)  >   Cisco IOS Vendors:   Cisco
Cisco IOS/IOS XE IPv6 Packet Processing Flaw Lets Remote Users Cause the Target System to Crash
SecurityTracker Alert ID:  1038065
SecurityTracker URL:  http://securitytracker.com/id/1038065
CVE Reference:   CVE-2017-3850   (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 crash.

A remote user can send a specially crafted IPv6 packet to a target device that supports the Autonomic Networking Infrastructure (ANI) feature to cause the target device to reload.

ANI does not need to be configured on the target device for the device to be vulnerable to exploit.

The vendor has assigned bug ID CSCvc42729 to this vulnerability.

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

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

The vendor advisory is available at:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170320-aniipv6

Vendor URL:  tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170320-aniipv6 (Links to External Site)
Cause:   Input validation error

Message History:   None.


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