Detections
Analytics
Cisco IOS XE Software Auxiliary Asynchronous Port DoS (cisco-sa-aux-333WBz8f)
medium Nessus Plugin ID 193267
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Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, Cisco IOS-XE Software is affected by a vulnerability.- 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. 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. (CVE-2024-20309)
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwh47363See Also
http://www.nessus.org/u?a1da659d
Plugin Details
Severity: Medium
ID: 193267
File Name: cisco-sa-aux-333WBz8f-iosxe.nasl
Version: 1.3
Type: combined
Family: CISCO
Published: 4/12/2024
Updated: 7/31/2025
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 4.6
Temporal Score: 3.4
Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C
CVSS Score Source: CVE-2024-20309
CVSS v3
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 4.8
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:cisco:ios_xe
Required KB Items: Host/Cisco/IOS-XE/Version
Exploit Ease: No known exploits are available
Patch Publication Date: 3/27/2024
Vulnerability Publication Date: 3/27/2024
Reference Information
CVE: CVE-2024-20309