CVE-2024-20309: Medium severity cisco ios xe vulnerability

Published Mar 27, 2024
·
Updated

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.

Affected Software

344 affected components
Cisco IOS XE Software
Cisco IOS XE=3.2.0se
Cisco IOS XE=3.2.1se
Cisco IOS XE=3.2.2se
Cisco IOS XE=3.2.3se
Cisco IOS XE=3.3.0se
Cisco IOS XE=3.3.0sq
Cisco IOS XE=3.3.1se
Cisco IOS XE=3.3.1sq
Cisco IOS XE=3.3.2se
Cisco IOS XE=3.3.3se
Cisco IOS XE=3.3.4se
Cisco IOS XE=3.3.5se
Cisco IOS XE=3.4.0sq
Cisco IOS XE=3.4.1sq
Cisco IOS XE=3.5.0sq
Cisco IOS XE=3.5.1sq
Cisco IOS XE=3.5.2sq
Cisco IOS XE=3.5.3sq
Cisco IOS XE=3.5.4sq
Cisco IOS XE=3.5.5sq
Cisco IOS XE=3.5.6sq
Cisco IOS XE=3.5.7sq
Cisco IOS XE=3.5.8sq
Cisco IOS XE=3.6.2ae
Cisco IOS XE=3.6.2e
Cisco IOS XE=3.6.5be
Cisco IOS XE=3.6.7be
Cisco IOS XE=3.6.9e
Cisco IOS XE=3.6.10e
Cisco IOS XE=3.7.0bs
Cisco IOS XE=3.7.0s
Cisco IOS XE=3.7.1as
Cisco IOS XE=3.7.1s
Cisco IOS XE=3.7.2s
Cisco IOS XE=3.7.2ts
Cisco IOS XE=3.7.3s
Cisco IOS XE=3.7.4as
Cisco IOS XE=3.7.4s
Cisco IOS XE=3.7.5s
Cisco IOS XE=3.7.6s
Cisco IOS XE=3.7.7s
Cisco IOS XE=3.8.0s
Cisco IOS XE=3.8.1s
Cisco IOS XE=3.8.2s
Cisco IOS XE=3.9.0as
Cisco IOS XE=3.9.0s
Cisco IOS XE=3.9.1as
Cisco IOS XE=3.9.1s
Cisco IOS XE=3.9.2s
Cisco IOS XE=3.10.0s
Cisco IOS XE=3.10.1s
Cisco IOS XE=3.10.1xbs
Cisco IOS XE=3.10.2s
Cisco IOS XE=3.10.2ts
Cisco IOS XE=3.10.3s
Cisco IOS XE=3.10.4s
Cisco IOS XE=3.10.5s
Cisco IOS XE=3.10.6s
Cisco IOS XE=3.10.7s
Cisco IOS XE=3.10.8as
Cisco IOS XE=3.10.8s
Cisco IOS XE=3.10.9s
Cisco IOS XE=3.10.10s
Cisco IOS XE=3.11.0s
Cisco IOS XE=3.11.1s
Cisco IOS XE=3.11.2s
Cisco IOS XE=3.11.3s
Cisco IOS XE=3.11.4s
Cisco IOS XE=3.12.0as
Cisco IOS XE=3.12.0s
Cisco IOS XE=3.12.1s
Cisco IOS XE=3.12.2s
Cisco IOS XE=3.12.3s
Cisco IOS XE=3.12.4s
Cisco IOS XE=3.13.0as
Cisco IOS XE=3.13.0s
Cisco IOS XE=3.13.1s
Cisco IOS XE=3.13.2as
Cisco IOS XE=3.13.2s
Cisco IOS XE=3.13.3s
Cisco IOS XE=3.13.4s
Cisco IOS XE=3.13.5as
Cisco IOS XE=3.13.5s
Cisco IOS XE=3.13.6as
Cisco IOS XE=3.13.6s
Cisco IOS XE=3.13.7as
Cisco IOS XE=3.13.7s
Cisco IOS XE=3.13.8s
Cisco IOS XE=3.13.9s
Cisco IOS XE=3.13.10s
Cisco IOS XE=3.14.0s
Cisco IOS XE=3.14.1s
Cisco IOS XE=3.14.2s
Cisco IOS XE=3.14.3s
Cisco IOS XE=3.14.4s
Cisco IOS XE=3.15.0s
Cisco IOS XE=3.15.1cs
Cisco IOS XE=3.15.1s
Cisco IOS XE=3.15.2s
Cisco IOS XE=3.15.3s
Cisco IOS XE=3.15.4s
Cisco IOS XE=3.16.0cs
Cisco IOS XE=3.16.0s
Cisco IOS XE=3.16.1as
Cisco IOS XE=3.16.1s
Cisco IOS XE=3.16.2as
Cisco IOS XE=3.16.2bs
Cisco IOS XE=3.16.2s
Cisco IOS XE=3.16.3as
Cisco IOS XE=3.16.3s
Cisco IOS XE=3.16.4as
Cisco IOS XE=3.16.4bs
Cisco IOS XE=3.16.4ds
Cisco IOS XE=3.16.4s
Cisco IOS XE=3.16.5s
Cisco IOS XE=3.16.6bs
Cisco IOS XE=3.16.6s
Cisco IOS XE=3.16.7as
Cisco IOS XE=3.16.7bs
Cisco IOS XE=3.16.7s
Cisco IOS XE=3.16.8s
Cisco IOS XE=3.16.9s
Cisco IOS XE=3.16.10s
Cisco IOS XE=3.17.0s
Cisco IOS XE=3.17.1as
Cisco IOS XE=3.17.1s
Cisco IOS XE=3.17.2s
Cisco IOS XE=3.17.3s
Cisco IOS XE=3.17.4s
Cisco IOS XE=3.18.0as
Cisco IOS XE=3.18.0s
Cisco IOS XE=3.18.0sp
Cisco IOS XE=3.18.1asp
Cisco IOS XE=3.18.1bsp
Cisco IOS XE=3.18.1csp
Cisco IOS XE=3.18.1s
Cisco IOS XE=3.18.1sp
Cisco IOS XE=3.18.2asp
Cisco IOS XE=3.18.2s
Cisco IOS XE=3.18.2sp
Cisco IOS XE=3.18.3asp
Cisco IOS XE=3.18.3bsp
Cisco IOS XE=3.18.3s
Cisco IOS XE=3.18.3sp
Cisco IOS XE=3.18.4s
Cisco IOS XE=3.18.4sp
Cisco IOS XE=3.18.5sp
Cisco IOS XE=3.18.6sp
Cisco IOS XE=3.18.7sp
Cisco IOS XE=3.18.8asp
Cisco IOS XE=3.18.9sp
Cisco IOS XE=16.1.1
Cisco IOS XE=16.1.2
Cisco IOS XE=16.1.3
Cisco IOS XE=16.2.1
Cisco IOS XE=16.2.2
Cisco IOS XE=16.3.1
Cisco IOS XE=16.3.1a
Cisco IOS XE=16.3.2
Cisco IOS XE=16.3.3
Cisco IOS XE=16.3.4
Cisco IOS XE=16.3.5
Cisco IOS XE=16.3.5b
Cisco IOS XE=16.3.6
Cisco IOS XE=16.3.7
Cisco IOS XE=16.3.8
Cisco IOS XE=16.3.9
Cisco IOS XE=16.3.10
Cisco IOS XE=16.3.11
Cisco IOS XE=16.4.1
Cisco IOS XE=16.4.2
Cisco IOS XE=16.4.3
Cisco IOS XE=16.5.1
Cisco IOS XE=16.5.1a
Cisco IOS XE=16.5.1b
Cisco IOS XE=16.5.2
Cisco IOS XE=16.5.3
Cisco IOS XE=16.6.1
Cisco IOS XE=16.6.2
Cisco IOS XE=16.6.3
Cisco IOS XE=16.6.4
Cisco IOS XE=16.6.4a
Cisco IOS XE=16.6.5
Cisco IOS XE=16.6.5a
Cisco IOS XE=16.6.6
Cisco IOS XE=16.6.7
Cisco IOS XE=16.6.8
Cisco IOS XE=16.6.9
Cisco IOS XE=16.6.10
Cisco IOS XE=16.7.1
Cisco IOS XE=16.7.1a
Cisco IOS XE=16.7.1b
Cisco IOS XE=16.7.2
Cisco IOS XE=16.7.3
Cisco IOS XE=16.7.4
Cisco IOS XE=16.8.1
Cisco IOS XE=16.8.1a
Cisco IOS XE=16.8.1b
Cisco IOS XE=16.8.1c
Cisco IOS XE=16.8.1d
Cisco IOS XE=16.8.1e
Cisco IOS XE=16.8.1s
Cisco IOS XE=16.8.2
Cisco IOS XE=16.8.3
Cisco IOS XE=16.9.1
Cisco IOS XE=16.9.1a
Cisco IOS XE=16.9.1b
Cisco IOS XE=16.9.1s
Cisco IOS XE=16.9.2
Cisco IOS XE=16.9.3
Cisco IOS XE=16.9.3a
Cisco IOS XE=16.9.4
Cisco IOS XE=16.9.5
Cisco IOS XE=16.9.5f
Cisco IOS XE=16.9.6
Cisco IOS XE=16.9.7
Cisco IOS XE=16.9.8
Cisco IOS XE=16.10.1
Cisco IOS XE=16.10.1a
Cisco IOS XE=16.10.1b
Cisco IOS XE=16.10.1c
Cisco IOS XE=16.10.1d
Cisco IOS XE=16.10.1e
Cisco IOS XE=16.10.1f
Cisco IOS XE=16.10.1g
Cisco IOS XE=16.10.1s
Cisco IOS XE=16.10.2
Cisco IOS XE=16.10.3
Cisco IOS XE=16.11.1
Cisco IOS XE=16.11.1a
Cisco IOS XE=16.11.1b
Cisco IOS XE=16.11.1s
Cisco IOS XE=16.11.2
Cisco IOS XE=16.12.1
Cisco IOS XE=16.12.1a
Cisco IOS XE=16.12.1c
Cisco IOS XE=16.12.1s
Cisco IOS XE=16.12.1t
Cisco IOS XE=16.12.1w
Cisco IOS XE=16.12.1x
Cisco IOS XE=16.12.1y
Cisco IOS XE=16.12.1z1
Cisco IOS XE=16.12.1z2
Cisco IOS XE=16.12.2
Cisco IOS XE=16.12.2a
Cisco IOS XE=16.12.2s
Cisco IOS XE=16.12.3
Cisco IOS XE=16.12.3a
Cisco IOS XE=16.12.3s
Cisco IOS XE=16.12.4
Cisco IOS XE=16.12.4a
Cisco IOS XE=16.12.5
Cisco IOS XE=16.12.5a
Cisco IOS XE=16.12.5b
Cisco IOS XE=16.12.6
Cisco IOS XE=16.12.6a
Cisco IOS XE=16.12.7
Cisco IOS XE=16.12.8
Cisco IOS XE=16.12.9
Cisco IOS XE=16.12.10
Cisco IOS XE=16.12.10a
Cisco IOS XE=17.1.1
Cisco IOS XE=17.1.1a
Cisco IOS XE=17.1.1s
Cisco IOS XE=17.1.1t
Cisco IOS XE=17.1.3
Cisco IOS XE=17.2.1
Cisco IOS XE=17.2.1a
Cisco IOS XE=17.2.1r
Cisco IOS XE=17.2.1v
Cisco IOS XE=17.2.2
Cisco IOS XE=17.2.3
Cisco IOS XE=17.3.1
Cisco IOS XE=17.3.1a
Cisco IOS XE=17.3.1w
Cisco IOS XE=17.3.1x
Cisco IOS XE=17.3.1z
Cisco IOS XE=17.3.2
Cisco IOS XE=17.3.2a
Cisco IOS XE=17.3.3
Cisco IOS XE=17.3.4
Cisco IOS XE=17.3.4a
Cisco IOS XE=17.3.4b
Cisco IOS XE=17.3.4c
Cisco IOS XE=17.3.5
Cisco IOS XE=17.3.5a
Cisco IOS XE=17.3.5b
Cisco IOS XE=17.3.6
Cisco IOS XE=17.3.7
Cisco IOS XE=17.3.8
Cisco IOS XE=17.3.8a
Cisco IOS XE=17.4.1
Cisco IOS XE=17.4.1a
Cisco IOS XE=17.4.1b
Cisco IOS XE=17.4.2
Cisco IOS XE=17.4.2a
Cisco IOS XE=17.5.1
Cisco IOS XE=17.5.1a
Cisco IOS XE=17.6.1
Cisco IOS XE=17.6.1a
Cisco IOS XE=17.6.1w
Cisco IOS XE=17.6.1x
Cisco IOS XE=17.6.1y
Cisco IOS XE=17.6.1z
Cisco IOS XE=17.6.1z1
Cisco IOS XE=17.6.2
Cisco IOS XE=17.6.3
Cisco IOS XE=17.6.3a
Cisco IOS XE=17.6.4
Cisco IOS XE=17.6.5
Cisco IOS XE=17.6.5a
Cisco IOS XE=17.6.6
Cisco IOS XE=17.6.6a
Cisco IOS XE=17.7.1
Cisco IOS XE=17.7.1a
Cisco IOS XE=17.7.1b
Cisco IOS XE=17.7.2
Cisco IOS XE=17.8.1
Cisco IOS XE=17.8.1a
Cisco IOS XE=17.9.1
Cisco IOS XE=17.9.1a
Cisco IOS XE=17.9.1w
Cisco IOS XE=17.9.1x
Cisco IOS XE=17.9.1x1
Cisco IOS XE=17.9.1y
Cisco IOS XE=17.9.1y1
Cisco IOS XE=17.9.2
Cisco IOS XE=17.9.2a
Cisco IOS XE=17.9.3
Cisco IOS XE=17.9.3a
Cisco IOS XE=17.9.4
Cisco IOS XE=17.9.4a
Cisco IOS XE=17.10.1
Cisco IOS XE=17.10.1a
Cisco IOS XE=17.10.1b
Cisco IOS XE=17.11.1
Cisco IOS XE=17.11.1a
Cisco IOS XE=17.11.99sw
Cisco IOS XE=17.12.1
Cisco IOS XE=17.12.1a
Cisco IOS XE=17.12.1w
Cisco IOS XE=17.12.2
Cisco IOS XE=17.12.2a

Event History

Mar 27, 2024
CVE Published
via MITRE·05:02 PM
Data Sourced
via MITRE·05:02 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·05:15 PM
DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2024-20309?

CVE-2024-20309 has a high severity rating due to its potential impact on device availability.

2

How do I fix CVE-2024-20309?

To mitigate CVE-2024-20309, upgrade to the latest version of Cisco IOS XE Software that addresses this vulnerability.

3

Who is affected by CVE-2024-20309?

Authenticated, local attackers can exploit CVE-2024-20309 on devices running affected versions of Cisco IOS XE Software.

4

What are the symptoms of CVE-2024-20309?

Devices affected by CVE-2024-20309 may reload unexpectedly or stop responding due to improper handling of ingress traffic.

5

Is CVE-2024-20309 remotely exploitable?

CVE-2024-20309 is not remotely exploitable as it requires local authentication to be attacked.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203