# CVE-2020-6097: atftp: An exploitable denial of service vulnerability exists in the atftpd daemon functionality of atftp 0.7.git20120829-3.1+b1

CVE-2020-6097 is fixed in 2 products on 1 platform, first by atftp 0.7.git20120829-3.1~0.18.04.1+esm1, released February 4, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-6097
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0215
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 10, 2020

## Description

An exploitable denial of service vulnerability exists in the atftpd daemon functionality of atftp 0.7.git20120829-3.1+b1. A specially crafted sequence of RRQ-Multicast requests trigger an assert() call resulting in denial-of-service. An attacker can send a sequence of malicious packets to trigger this vulnerability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | atftp Ubuntu 18.04.6 LTS (bionic) | 0.7.git20120829-3.1~0.18.04.1+esm1 | [atftp 0.7.git20120829-3.1~0.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-atftp-0.7.git20120829-3.1-0.18.04.1-esm1.md) | Feb 4, 2022 |
| Linux | atftp Ubuntu 20.04 LTS (focal) | 0.7.git20120829-3.1ubuntu0.1 | [atftp 0.7.git20120829-3.1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-atftp-0.7.git20120829-3.1ubuntu0.1.md) | Feb 4, 2022 |
| Linux | atftpd Ubuntu 18.04.6 LTS (bionic) | 0.7.git20120829-3.1~0.18.04.1+esm1 | [atftpd 0.7.git20120829-3.1~0.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-atftpd-0.7.git20120829-3.1-0.18.04.1-esm1.md) | Feb 4, 2022 |
| Linux | atftpd Ubuntu 20.04 LTS (focal) | 0.7.git20120829-3.1ubuntu0.1 | [atftpd 0.7.git20120829-3.1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-atftpd-0.7.git20120829-3.1ubuntu0.1.md) | Feb 4, 2022 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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