CVE-2021-4186 Null dereference in Wireshark

What is CVE-2021-4186?

CVE-2021-4186 is a medium-severity vulnerability in Fedoraproject Fedora, published on 30 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Crash in the Gryphon dissector in Wireshark 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

Weakness: CWE-476

Which versions are affected by CVE-2021-4186?

It affects 2 products.

Products include Fedoraproject Fedora, Wireshark Wireshark.

How do I fix CVE-2021-4186?

Upgrade to a fixed version.

Is CVE-2021-4186 being exploited?

There is no known exploitation of CVE-2021-4186 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-7421, DEBIAN-CVE-2021-4186, GHSA-7c4g-8373-rcp3, UBUNTU-CVE-2021-4186.