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Cisco IOS ARP Table Overwrite Vulnerability - Cisco Systems

medium Nessus Plugin ID 48961

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

It is possible to send an Address Resolution Protocol (ARP) packet on a local broadcast interface (for example, Ethernet, cable, Token Ring, FDDI) which could cause a router or switch running specific versions of Cisco IOS Software Release to stop sending and receiving ARP packets on the local router interface. This will in a short time cause the router and local hosts to be unable to send packets to each other. ARP packets received by the router for the router's own interface address but a different Media Access Control (MAC) address will overwrite the router's MAC address in the ARP table with the one from the received ARP packet. This was demonstrated to attendees of the Black Hat conference and should be considered to be public knowledge. This attack is only successful against devices on the segment local to the attacker or attacking host. This vulnerability is documented in Cisco Bug ID CSCdu81936, and a workaround is available.

Solution

Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20011115-ios-arp-overwrite.

See Also

http://www.nessus.org/u?1c376185

http://www.nessus.org/u?40d7b236

Plugin Details

Severity: Medium

ID: 48961

File Name: cisco-sa-20011115-ios-arp-overwritehttp.nasl

Version: 1.10

Type: local

Family: CISCO

Published: 9/1/2010

Updated: 11/15/2018

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 11/15/2001

Vulnerability Publication Date: 11/15/2001

Reference Information

CVE: CVE-2001-0895

BID: 3547