CVE-2018-17974

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-10-03 · updated 2026-06-17
Weakness: CWE-125

Description

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

appneta tcpreplay: 4.3.0-beta1

References

https://github.com/SegfaultMasters/covering360/tree/master/tcpreplay
https://github.com/appneta/tcpreplay/issues/486
https://github.com/SegfaultMasters/covering360/tree/master/tcpreplay
https://github.com/appneta/tcpreplay/issues/486

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