CVE-2023-20072

Cisco IOS XE Software Fragmented Tunnel Protocol Packet Denial of Service Vulnerability

State: Published
Severity: 8.6 High
Published: Mar 23, 2023
Updated: Oct 28, 2024
Reserved: Oct 27, 2022

Description

A vulnerability in the fragmentation handling code of tunnel protocol packets in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected system to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to the improper handling of large fragmented tunnel protocol packets. One example of a tunnel protocol is Generic Routing Encapsulation (GRE). An attacker could exploit this vulnerability by sending crafted fragmented packets to an affected system. A successful exploit could allow the attacker to cause the affected system to reload, resulting in a DoS condition. Note: Only traffic directed to the affected system can be used to exploit this vulnerability.

Scores

CVSS	Score	Vector	Source
3.1	8.6 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	cisco

Weaknesses

CWE-20

Affected Products

Product	Versions
Cisco IOS XE SoftwareCisco	n/aAffected

References

20230322 Cisco IOS XE Software Fragmented Tunnel Protocol Packet Denial of Service Vulnerabilityvendor-advisory

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