Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

Go to Calendar     Go to Press Room     Go to Newsletters subscription

Search

CVE-2024-20309

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
27/03/2024
Last modified:
30/07/2025

Description

A vulnerability in auxiliary asynchronous port (AUX) functions of Cisco IOS XE Software could allow an authenticated, local attacker to cause an affected device to reload or stop responding.<br /> <br /> This vulnerability is due to the incorrect handling of specific ingress traffic when flow control hardware is enabled on the AUX port. An attacker could exploit this vulnerability by reverse telnetting to the AUX port and sending specific data after connecting. A successful exploit could allow the attacker to cause the device to reset or stop responding, resulting in a denial of service (DoS) condition.

Impact

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

Base Score: 5.60 MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

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

Base Score 3.x
5.60
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xe:3.2.0se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.2.1se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.2.2se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.2.3se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.0se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.0sq:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.1se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.1sq:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.2se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.3se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.4se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.5se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.0sq:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.1sq:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5.0sq:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools