cisco-sa-arp-mtfhBfjE: Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability
First published: Wed Mar 24 2021(Updated: )
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. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-arp-mtfhBfjE
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS | ||
| Cisco IOS XE Software |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-arp-mtfhBfjE?
The severity of cisco-sa-arp-mtfhBfjE is classified as high due to its potential impact on network connectivity.
How do I fix cisco-sa-arp-mtfhBfjE?
To fix cisco-sa-arp-mtfhBfjE, you should update the affected Cisco IOS or Cisco IOS XE software to a version that addresses the vulnerability.
What impact does cisco-sa-arp-mtfhBfjE have on my network?
cisco-sa-arp-mtfhBfjE could prevent legitimate hosts from resolving ARP entries, causing network disruptions and connectivity issues.
Who is affected by cisco-sa-arp-mtfhBfjE?
cisco-sa-arp-mtfhBfjE affects users of Cisco IOS Software and Cisco IOS XE Software running in environments that utilize ARP.
Is there a workaround for cisco-sa-arp-mtfhBfjE?
Currently, it is recommended to upgrade the software, as no specific workaround is provided for cisco-sa-arp-mtfhBfjE.
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