CVE-2023-20027
Cisco IOS XE Software Virtual Fragmentation Reassembly Denial of Service Vulnerability
A vulnerability in the implementation of the IPv4 Virtual Fragmentation Reassembly (VFR) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper reassembly of large packets that occurs when VFR is enabled on either a tunnel interface or on a physical interface that is configured with a maximum transmission unit (MTU) greater than 4,615 bytes. An attacker could exploit this vulnerability by sending fragmented packets through a VFR-enabled interface on an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
| CWE | CWE-416 |
| Vendor | cisco |
| Product | cisco ios xe software |
| Ecosystems | |
| Industries | NetworkingTelecommunications |
| Published | Mar 23, 2023 |
| Last Updated | Oct 28, 2024 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H