CVE-2023-27789 Denial of service in n/a

High 7.5 Published 16 Mar 2023 Updated 26 Feb 2025

A remote attacker can cause a denial of service in TCPprep via the cidr2cidr function, affecting systems using this library.

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

What is CVE-2023-27789?

CVE-2023-27789 is a high-severity denial of service vulnerability in Broadcom Tcpreplay, published on 16 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue found in TCPprep v.4.4.3 allows a remote attacker to cause a denial of service via the cidr2cidr function at the cidr.c:178 endpoint.

Weakness: CWE-617

Which versions are affected by CVE-2023-27789?

It affects 1 product.

Products include Broadcom Tcpreplay.

How do I fix CVE-2023-27789?

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-2023-27789 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-27789 exists.

All Broadcom Tcpreplay vulnerabilities

Sources

Also known as DEBIAN-CVE-2023-27789, GHSA-wm53-7w82-c6x3, UBUNTU-CVE-2023-27789.