CVE-2021-4182 Denial of service in Wireshark

What is CVE-2021-4182?

CVE-2021-4182 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 30 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Crash in the RFC 7468 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

Weakness: CWE-835

Which versions are affected by CVE-2021-4182?

It affects 4 products.

Products include Fedoraproject Fedora, Oracle Http Server, Oracle Zfs Storage Appliance Kit, Wireshark Wireshark.

How do I fix CVE-2021-4182?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-4182 being exploited?

There is no known exploitation of CVE-2021-4182 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-7418, DEBIAN-CVE-2021-4182, GHSA-3hwx-vc7v-fw2m, UBUNTU-CVE-2021-4182.