How severe is CVE-2018-17974?

CVE-2018-17974 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-17974 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-17974?

CVE-2018-17974 affects Broadcom Tcpreplay. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-17974?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-17974 published?

CVE-2018-17974 was published on 2018-10-03 and last updated on 2026-06-17.

CVE-2018-17974

CVE-2018-17974 is a medium-severity vulnerability in Broadcom Tcpreplay with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Broadcom Tcpreplay
Published: 2018-10-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-17974?: 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.
How severe is CVE-2018-17974?: CVE-2018-17974 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-17974 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-17974?: CVE-2018-17974 affects Broadcom Tcpreplay. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-17974?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-17974 published?: CVE-2018-17974 was published on 2018-10-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:broadcom:tcpreplay:4.3.0:beta1:*:*:*:*:*:*

More vulnerabilities in Broadcom Tcpreplay

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