cisco-sa-arp-mtfhBfjE

csafUScisco_csaf

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

view advisory published 2021-03-24

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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

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describes (1)

Related CVEs.

IDseverity exploitable
CVE-2021-1377USmedium5.8—
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 affect…
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references

External citations — patches, advisories, analysis.

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remediations (319)

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