CVE-2021-1377

Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability

Medium · published March 24, 2021

CVSS v3.1
5.8
EPSS
1%
Percentile
73.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.01484 · 73.8th percentile
Published
2021-03-24T20:10Z
EPSS history
Timeline
  • 24 MAR 20:10Z
    Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability
    cvelistv5