CVE-2019-5721 Use after free in n/a

Medium 5.5 Published 8 Jan 2019 Updated 4 Aug 2024

A use-after-free vulnerability in the Wireshark ENIP dissector allows attackers to cause a denial of service via crafted packets.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2019-5721?

CVE-2019-5721 is a medium-severity use after free vulnerability in Wireshark Wireshark, published on 8 Jan 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

In Wireshark 2.4.0 to 2.4.11, the ENIP dissector could crash. This was addressed in epan/dissectors/packet-enip.c by changing the memory-management approach so that a use-after-free is avoided.

Weakness: CWE-416

Which versions are affected by CVE-2019-5721?

It affects 1 product.

Products include Wireshark Wireshark.

How do I fix CVE-2019-5721?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2019-5721 being exploited?

There is no known exploitation of CVE-2019-5721 in the wild and no public exploit code.

All Wireshark Wireshark vulnerabilities

Sources

Also known as DEBIAN-CVE-2019-5721, GHSA-7gxq-23xx-mvh2.