CVE-2018-7421 Denial of service in n/a

High 7.5 Published 23 Feb 2018 Updated 5 Aug 2024

An attacker can cause Wireshark to enter an infinite loop via a malicious DMP packet, leading to application denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-7421?

CVE-2018-7421 is a high-severity denial of service vulnerability in Wireshark Wireshark, published on 23 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

Weakness: CWE-835

Which versions are affected by CVE-2018-7421?

It affects 1 product.

Products include Wireshark Wireshark.

How do I fix CVE-2018-7421?

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-2018-7421 being exploited?

There is no known exploitation of CVE-2018-7421 in the wild and no public exploit code.

All Wireshark Wireshark vulnerabilities

Sources

Also known as DEBIAN-CVE-2018-7421, GHSA-7mvc-3rvp-5f4m, UBUNTU-CVE-2018-7421.