CVE-2020-18976

Name: CVE-2020-18976
Creator: NVD / NIST
Published: 2021-08-25T16:15:08.687+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2020-18976 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the 'do_checksum' function in 'checksum.c'. It can be triggered by sending a crafted pcap file to the 'tcpreplay-edit' binary. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the 'do_checksum' function in 'checksum.c'. It can be triggered by sending a crafted pcap file to the 'tcpreplay-edit' binary. This issue is different than CVE-2019-8381.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

0.66%

46.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Broadcom	Tcpreplay	4.3.2

References

https://github.com/appneta/tcpreplay/issues/556Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/appneta/tcpreplay/issues/556Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Aug 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-18976?

How severe is CVE-2020-18976?

CVE-2020-18976 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2020-18976?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-18976?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST