Vulnerability · Published Mar 24, 2021 · Assigned by cisco
CVE-2021-1377Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability
Medium 5.8
In plain English
A medium-severity security flaw in Cisco IOS from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities).
Official 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.
Affected products (as reported)
Weakness: CWE-399 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
References
- 20210324 Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO