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Cisco IOS: CVE-2021-1377: Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability

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Cisco IOS: CVE-2021-1377: Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
03/25/2021
Created
03/25/2021
Added
03/25/2021
Modified
10/06/2021

Description

A vulnerability in Address Resolution Protocol (ARP) management of Cisco IOS Software and 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.

Solution(s)

  • cisco-ios-upgrade-latest

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