CVE-2021-4185: High severity Wireshark Wireshark vulnerability

Published Dec 30, 2021
·
Updated

Infinite loop in the RTMPT dissector in Wireshark 3.6.0 and 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

Affected Software

18 affected componentsFixes available
Wireshark Wireshark>=3.4.0<3.4.11
Wireshark Wireshark=3.6.0
Fedoraproject Fedora=34
Fedoraproject Fedora=35
Debian Debian Linux=9.0
Oracle HTTP Server=12.2.1.3.0
Oracle HTTP Server=12.2.1.4.0
Oracle ZFS Storage Appliance Kit=8.8
alpine/wireshark>=3.4.0<3.4.13-r0
3.4.13-r0
alpine/wireshark>=3.4.0<3.4.11-r0
3.4.11-r0
alpine/wireshark>=3.4.0<3.4.11-r0
3.4.11-r0
alpine/wireshark>=3.4.0<3.4.11-r0
3.4.11-r0
alpine/wireshark>=3.4.0<3.4.11-r0
3.4.11-r0
alpine/wireshark>=3.4.0<3.4.11-r0
3.4.11-r0
alpine/wireshark>=3.4.0<3.4.11-r0
3.4.11-r0
alpine/wireshark>=3.4.0<3.4.11-r0
3.4.11-r0
alpine/wireshark>=3.4.0<3.4.11-r0
3.4.11-r0
alpine/wireshark>=3.4.0<3.4.11-r0
3.4.11-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade alpine/wireshark to a version that resolves this vulnerability.

    Fixed in 3.4.13-r0
  2. Upgrade

    Upgrade alpine/wireshark to a version that resolves this vulnerability.

    Fixed in 3.4.11-r0

Event History

Dec 30, 2021
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·10:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·10:15 PM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is CVE-2021-4185?

CVE-2021-4185 is a vulnerability in Wireshark 3.6.0 and 3.4.0 to 3.4.10 that allows denial of service through packet injection or crafted capture file.

2

How does CVE-2021-4185 impact Wireshark?

CVE-2021-4185 can result in an infinite loop in the RTMPT dissector of Wireshark, leading to a denial of service.

3

What is the severity of CVE-2021-4185?

CVE-2021-4185 has a severity rating of 7.5 (High).

4

Which software versions are affected by CVE-2021-4185?

Wireshark versions 3.6.0 and 3.4.0 to 3.4.10 are affected by CVE-2021-4185.

5

How can I fix CVE-2021-4185?

To fix CVE-2021-4185, update to Wireshark version 3.4.11 or newer.

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