Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2023-20027

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 69.1%
CVSS Severity
CVSS v3 Score 8.6
Products affected by CVE-2023-20027


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