Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2023-20027

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
23/03/2023
Last modified:
07/11/2023

Description

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.60 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
8.60
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xe:3.9.0as:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.9.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.9.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.2as:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.2ts:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.3s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.4s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.5s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.6s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.7s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.8as:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.8s:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools