CVE-2020-12740

tcprewrite in Tcpreplay through 4.3.2 has a heap-based buffer over-rea ...

Published 8 May 2020Modified 17 Jun 2026CWE 125

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (medium).

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.

Affected packages and fixed versions

Source	Package	Fixed in
debian 11	tcpreplay	4.3.3-1
debian 12	tcpreplay	4.3.3-1
debian 13	tcpreplay	4.3.3-1
debian 14	tcpreplay	4.3.3-1
echo	tcpreplay	4.3.3-1
ubuntu 18.04-ESM	tcpreplay	4.2.6-1ubuntu0.1~esm3
ubuntu 20.04-ESM	tcpreplay	4.3.2-1ubuntu0.1~esm1

References

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Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.