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Vulnerability record · CVE-2023-27786 · published 16 March 2023

CVE-2023-27786: Broadcom tcpreplay null pointer dereference vulnerability

Broadcom · Tcpreplay

An issue found in TCPprep v.4.4.3 allows a remote attacker to cause a denial of service via the macinstring function.

7.5 CVSS 3.1 High EPSS 1.5% · top 27.2% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue found in TCPprep v.4.4.3 allows a remote attacker to cause a denial of service via the macinstring function.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/appneta/tcpreplay/issues/782 ExploitIssue TrackingPatch
https://github.com/appneta/tcpreplay/pull/783 Issue TrackingPatch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R3ER3YTFR3XIDMYEB7LMFWF
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UE3J4LKYFNKPKNSLDQK4JG3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UK2BRH3W3ECF5FDXP6QM3ZE
https://github.com/appneta/tcpreplay/issues/782 ExploitIssue TrackingPatch
https://github.com/appneta/tcpreplay/pull/783 Issue TrackingPatch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R3ER3YTFR3XIDMYEB7LMFWF
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UE3J4LKYFNKPKNSLDQK4JG3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UK2BRH3W3ECF5FDXP6QM3ZE

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-18408Broadcom tcpreplay use after free vulnerabilityA use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the function post_args() at tcpbridge.c…EPSS 2.3%9.1CVE-2020-12740Broadcom tcpreplay out-of-bounds read vulnerabilitytcprewrite 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_ip…EPSS 1.7%7.8CVE-2025-51006Broadcom tcpreplay double free vulnerabilityWithin tcpreplay's tcprewrite, a double free vulnerability has been identified in the dlt_linuxsll2_cleanup() function in plugins/dlt_linuxsll2/linux…EPSS 0.19%7.8CVE-2024-3024Broadcom tcpreplay heap-based buffer overflow vulnerabilityA vulnerability was found in appneta tcpreplay up to 4.4.4. It has been classified as problematic. This affects the function get_layer4_v6 of the fil…EPSS 0.44%7.8CVE-2022-37048Broadcom tcpreplay out-of-bounds write vulnerabilityThe component tcprewrite in Tcpreplay v4.4.1 was discovered to contain a heap-based buffer overflow in get_l2len_protocol at common/get.c:344. NOTE: …EPSS 0.42%7.8CVE-2022-37049Broadcom tcpreplay out-of-bounds write vulnerabilityThe component tcpprep in Tcpreplay v4.4.1 was discovered to contain a heap-based buffer overflow in parse_mpls at common/get.c:150. NOTE: this is dif…EPSS 0.42%7.8CVE-2022-37047Broadcom tcpreplay out-of-bounds write vulnerabilityThe component tcprewrite in Tcpreplay v4.4.1 was discovered to contain a heap-based buffer overflow in get_ipv6_next at common/get.c:713. NOTE: this …EPSS 0.42%7.8CVE-2022-27418Broadcom tcpreplay out-of-bounds write vulnerabilityTcpreplay v4.4.1 has a heap-based buffer overflow in do_checksum_math at /tcpedit/checksum.c.EPSS 0.85%

Source: NIST National Vulnerability Database (record CVE-2023-27786), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.