CVE-2020-12740 Memory corruption in n/a

Critical 9.1 Published 8 May 2020 Updated 4 Aug 2024

A heap-based buffer over-read in Tcpreplay allows attackers to cause denial of service or disclose sensitive memory contents via crafted packets.

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

What is CVE-2020-12740?

CVE-2020-12740 is a critical memory corruption vulnerability in Broadcom Tcpreplay, published on 8 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

tcprewrite in Tcpreplay through 4.3.2 has a heap-based buffer over-read during a get_c operation. The issue is being triggered in the function get_ipv6_next() at common/get.c.

Weakness: CWE-125

Which versions are affected by CVE-2020-12740?

It affects 2 products.

Linux distribution packages (1)

tcpreplay openSUSE:Tumbleweed All versions 4.6.2-1.1

Products include Broadcom Tcpreplay, Fedoraproject Fedora.

How do I fix CVE-2020-12740?

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-2020-12740 being exploited?

There is no known exploitation of CVE-2020-12740 in the wild and no public exploit code.

All Broadcom Tcpreplay vulnerabilities

Sources

Also known as DEBIAN-CVE-2020-12740, GHSA-95wm-mm55-cxhx, MGASA-2020-0278, UBUNTU-CVE-2020-12740, openSUSE-SU-2026:12337-1.