CVE-2021-39920 Null dereference in Wireshark

What is CVE-2021-39920?

CVE-2021-39920 is a high-severity vulnerability in Fedoraproject Fedora, published on 18 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

NULL pointer exception in the IPPUSB dissector in Wireshark 3.4.0 to 3.4.9 allows denial of service via packet injection or crafted capture file

Weakness: CWE-476

Which versions are affected by CVE-2021-39920?

It affects 2 products.

Products include Fedoraproject Fedora, Wireshark Wireshark.

How do I fix CVE-2021-39920?

Upgrade to a fixed version.

Is CVE-2021-39920 being exploited?

There is no known exploitation of CVE-2021-39920 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-7408, DEBIAN-CVE-2021-39920, GHSA-v5f8-gc5j-r8rv, UBUNTU-CVE-2021-39920.