CVE-2020-26421 Denial of service in Wireshark
Attackers can cause a denial of service in Wireshark by injecting crafted packets or providing malicious capture files to the USB HID dissector.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-26421?
CVE-2020-26421 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 11 Dec 2020. 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 USB HID protocol dissector and possibly other dissectors in Wireshark 3.4.0 and 3.2.0 to 3.2.8 allows denial of service via packet injection or crafted capture file.
Weakness: CWE-125
Which versions are affected by CVE-2020-26421?
It affects 4 products.
Products include Debian Debian Linux, Fedoraproject Fedora, Oracle Zfs Storage Appliance Kit, Wireshark Wireshark.
How do I fix CVE-2020-26421?
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-2020-26421 being exploited?
There is no known exploitation of CVE-2020-26421 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2020-26421, GHSA-955v-hqm3-9444, UBUNTU-CVE-2020-26421.