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Vulnerability record · CVE-2018-18409 · published 17 October 2018

CVE-2018-18409: Digitalcorpora tcpflow out-of-bounds read vulnerability

DDigitalcorpora · Tcpflow

A stack-based buffer over-read exists in setbit() at iptree.h of TCPFLOW 1.5.0, due to received incorrect values causing incorrect computation, leading to denial of service during an address_histogram call or a get_histogram call.

5.5 CVSS 3.0 Medium EPSS 1.3% · top 30.6% CWE-125 · Out-of-bounds read
5.5CVSS 3.0 base score, v2 4.3
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A stack-based buffer over-read exists in setbit() at iptree.h of TCPFLOW 1.5.0, due to received incorrect values causing incorrect computation, leading to denial of service during an address_histogram call or a get_histogram call.

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

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

References

LinkTags
https://github.com/simsong/tcpflow/issues/195 ExploitPatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K6MP4YMCJX4ITOBFX427UMO
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MN5FW6HKPDP7PI2IVNMFSQV
https://usn.ubuntu.com/3955-1/ Third Party Advisory
https://github.com/simsong/tcpflow/issues/195 ExploitPatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K6MP4YMCJX4ITOBFX427UMO
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MN5FW6HKPDP7PI2IVNMFSQV
https://usn.ubuntu.com/3955-1/ Third Party Advisory

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

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Source: NIST National Vulnerability Database (record CVE-2018-18409), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.