CVE-2023-6175 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in Wireshark

High 7.8 Published 26 Mar 2024 Updated 27 Mar 2026

Attackers can cause a denial of service in Wireshark by providing a crafted capture file that triggers a buffer overflow in the NetScreen parser.

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-2023-6175?

CVE-2023-6175 is a high-severity memory corruption vulnerability in Wireshark Wireshark, published on 26 Mar 2024. 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

NetScreen file parser crash in Wireshark 4.0.0 to 4.0.10 and 3.6.0 to 3.6.18 allows denial of service via crafted capture file

Weakness: CWE-120

Which versions are affected by CVE-2023-6175?

It affects 1 product.

Linux distribution packages (6)

`wireshark` SUSE:Linux Enterprise Module for Basesystem 15 SP4	All versions	`3.6.19-150000.3.106.1`
`wireshark` SUSE:Linux Enterprise Module for Basesystem 15 SP5	All versions	`3.6.19-150000.3.106.1`
`wireshark` SUSE:Linux Enterprise Module for Desktop Applications 15 SP4	All versions	`3.6.19-150000.3.106.1`
`wireshark` SUSE:Linux Enterprise Module for Desktop Applications 15 SP5	All versions	`3.6.19-150000.3.106.1`
`wireshark` openSUSE:Leap 15.4	All versions	`3.6.19-150000.3.106.1`
`wireshark` openSUSE:Leap 15.5	All versions	`3.6.19-150000.3.106.1`

Products include Wireshark Wireshark.

How do I fix CVE-2023-6175?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-6175 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-6175 exists.

All Wireshark Wireshark vulnerabilities

Sources

Also known as AZL-42527, AZL-42552, DEBIAN-CVE-2023-6175, GHSA-r8r7-4wvf-px33, OESA-2023-1847, SUSE-SU-2023:4938-1 and 1 more.