# CVE-2018-18409: tcpflow: A stack-based buffer over-read exists in setbit() at iptree.h of TCPFLOW 1.5.0, due to received incorrect values caus...

CVE-2018-18409 is fixed in 2 products on 1 platform, first by tcpflow 1.4.5+repack1-4ubuntu0.18.04.1, released October 16, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-18409
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0130
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 16, 2018

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tcpflow Ubuntu 18.04.6 LTS (bionic) | 1.4.5+repack1-4ubuntu0.18.04.1 | [tcpflow 1.4.5+repack1-4ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tcpflow-1.4.5-repack1-4ubuntu0.18.04.1.md) | Oct 16, 2018 |
| Linux | tcpflow-nox Ubuntu 18.04.6 LTS (bionic) | 1.4.5+repack1-4ubuntu0.18.04.1 | [tcpflow-nox 1.4.5+repack1-4ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tcpflow-nox-1.4.5-repack1-4ubuntu0.18.04.1.md) | Oct 16, 2018 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo