CVE-2018-17974: Broadcom Tcpreplay

Medium severity, CVSS 5.5. EPSS: 1% chance of exploitation in the next 30 days.

An issue was discovered in Tcpreplay 4.3.0 beta1. A heap-based buffer over-read was triggered in the function dlt_en10mb_encode() of the file plugins/dlt_en10mb/en10mb.c, due to inappropriate values in the function memmove(). The length (pktlen + ctx -> l2len) can be larger than source value (packet + ctx->l2len) because the function fails to ensure the length of a packet is valid. This leads to Denial of Service.

Affected products

• Broadcom Tcpreplay: version 4.3.0 only

Published 2018-10-03. Last modified 2026-06-17.