Cisco IOS XE Software ARP Resource Management Exhaustion Denial of Service (cisco-sa-arp-mtfhBfjE)

medium Nessus Plugin ID 148222
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Synopsis

The remote device is missing a vendor-supplied security patch

Description

A vulnerability in Address Resolution Protocol (ARP) management of Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent an affected device from resolving ARP entries for legitimate hosts on the connected subnets.
This vulnerability exists because ARP entries are mismanaged. An attacker could exploit this vulnerability by continuously sending traffic that results in incomplete ARP entries. A successful exploit could allow the attacker to cause ARP requests on the device to be unsuccessful for legitimate hosts, resulting in a denial of service (DoS) condition.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvv75175

See Also

http://www.nessus.org/u?39afa1f0

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv75175

Plugin Details

Severity: Medium

ID: 148222

File Name: cisco-sa-arp-mtfhBfjE-iosxe.nasl

Version: 1.5

Type: combined

Family: CISCO

Published: 3/30/2021

Updated: 4/1/2021

Dependencies: cisco_ios_xe_version.nasl

Risk Information

CVSS Score Source: CVE-2021-1377

VPR

Risk Factor: Low

Score: 1.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 3/24/2021

Vulnerability Publication Date: 3/24/2021

Reference Information

CVE: CVE-2021-1377

CISCO-BUG-ID: CSCvv75175

CISCO-SA: cisco-sa-arp-mtfhBfjE

CWE: 399