# CVE-2020-24916: erlang-yapp: CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.

CVE-2020-24916 is fixed in 7 products on 1 platform, first by erlang-yapp 2.0.4+dfsg-2ubuntu0.1, released September 9, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-24916
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.1737
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 9, 2020

## Description

CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | erlang-yapp Ubuntu 18.04.6 LTS (bionic) | 2.0.4+dfsg-2ubuntu0.1 | [erlang-yapp 2.0.4+dfsg-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-erlang-yapp-2.0.4-dfsg-2ubuntu0.1.md) | Sep 9, 2020 |
| Linux | erlang-yapp Ubuntu 20.04 LTS (focal) | 2.0.7+dfsg-1ubuntu0.1~esm1 | [erlang-yapp 2.0.7+dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-erlang-yapp-2.0.7-dfsg-1ubuntu0.1-esm1.md) | Sep 9, 2020 |
| Linux | erlang-yaws Ubuntu 18.04.6 LTS (bionic) | 2.0.4+dfsg-2ubuntu0.1 | [erlang-yaws 2.0.4+dfsg-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-erlang-yaws-2.0.4-dfsg-2ubuntu0.1.md) | Sep 9, 2020 |
| Linux | erlang-yaws Ubuntu 20.04 LTS (focal) | 2.0.7+dfsg-1ubuntu0.1~esm1 | [erlang-yaws 2.0.7+dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-erlang-yaws-2.0.7-dfsg-1ubuntu0.1-esm1.md) | Sep 9, 2020 |
| Linux | yaws Ubuntu 18.04.6 LTS (bionic) | 2.0.4+dfsg-2ubuntu0.1 | [yaws 2.0.4+dfsg-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-yaws-2.0.4-dfsg-2ubuntu0.1.md) | Sep 9, 2020 |
| Linux | yaws Ubuntu 20.04 LTS (focal) | 2.0.7+dfsg-1ubuntu0.1~esm1 | [yaws 2.0.7+dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-yaws-2.0.7-dfsg-1ubuntu0.1-esm1.md) | Sep 9, 2020 |
| Linux | yaws-chat Ubuntu 18.04.6 LTS (bionic) | 2.0.4+dfsg-2ubuntu0.1 | [yaws-chat 2.0.4+dfsg-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-yaws-chat-2.0.4-dfsg-2ubuntu0.1.md) | Sep 9, 2020 |
| Linux | yaws-chat Ubuntu 20.04 LTS (focal) | 2.0.7+dfsg-1ubuntu0.1~esm1 | [yaws-chat 2.0.7+dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-yaws-chat-2.0.7-dfsg-1ubuntu0.1-esm1.md) | Sep 9, 2020 |
| Linux | yaws-mail Ubuntu 18.04.6 LTS (bionic) | 2.0.4+dfsg-2ubuntu0.1 | [yaws-mail 2.0.4+dfsg-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-yaws-mail-2.0.4-dfsg-2ubuntu0.1.md) | Sep 9, 2020 |
| Linux | yaws-mail Ubuntu 20.04 LTS (focal) | 2.0.7+dfsg-1ubuntu0.1~esm1 | [yaws-mail 2.0.7+dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-yaws-mail-2.0.7-dfsg-1ubuntu0.1-esm1.md) | Sep 9, 2020 |
| Linux | yaws-wiki Ubuntu 18.04.6 LTS (bionic) | 2.0.4+dfsg-2ubuntu0.1 | [yaws-wiki 2.0.4+dfsg-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-yaws-wiki-2.0.4-dfsg-2ubuntu0.1.md) | Sep 9, 2020 |
| Linux | yaws-wiki Ubuntu 20.04 LTS (focal) | 2.0.7+dfsg-1ubuntu0.1~esm1 | [yaws-wiki 2.0.7+dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-yaws-wiki-2.0.7-dfsg-1ubuntu0.1-esm1.md) | Sep 9, 2020 |
| Linux | yaws-yapp Ubuntu 18.04.6 LTS (bionic) | 2.0.4+dfsg-2ubuntu0.1 | [yaws-yapp 2.0.4+dfsg-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-yaws-yapp-2.0.4-dfsg-2ubuntu0.1.md) | Sep 9, 2020 |
| Linux | yaws-yapp Ubuntu 20.04 LTS (focal) | 2.0.7+dfsg-1ubuntu0.1~esm1 | [yaws-yapp 2.0.7+dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-yaws-yapp-2.0.7-dfsg-1ubuntu0.1-esm1.md) | Sep 9, 2020 |

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