# CVE-2018-20553: tcpreplay: Tcpreplay before 4.3.1 has a heap-based buffer over-read in get_l2len in common/get.c.

CVE-2018-20553 is fixed in tcpreplay on 1 platform, first by tcpreplay 4.2.6-1ubuntu0.1~esm2, released December 28, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-20553
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0125
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 28, 2018

## Description

Tcpreplay before 4.3.1 has a heap-based buffer over-read in get_l2len in common/get.c.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tcpreplay Ubuntu 18.04.6 LTS (bionic) | 4.2.6-1ubuntu0.1~esm2 | [tcpreplay 4.2.6-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tcpreplay-4.2.6-1ubuntu0.1-esm2.md) | Dec 28, 2018 |
| Linux | tcpreplay Ubuntu 20.04 LTS (focal) | 4.3.2-1ubuntu0.1~esm1 | [tcpreplay 4.3.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tcpreplay-4.3.2-1ubuntu0.1-esm1.md) | Oct 19, 2020 |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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