# CVE-2020-15703: aptdaemon: There is no input validation on the Locale property in an apt transaction

CVE-2020-15703 is fixed in 7 products on 1 platform, first by aptdaemon 1.1.1+bzr982-0ubuntu19.4, released September 23, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-15703
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0049
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 23, 2020

## Description

There is no input validation on the Locale property in an apt transaction. An unprivileged user can supply a full path to a writable directory, which lets aptd read a file as root. Having a symlink in place results in an error message if the file exists, and no error otherwise. This way an unprivileged user can check for the existence of any files on the system as root.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | aptdaemon Ubuntu 18.04.6 LTS (bionic) | 1.1.1+bzr982-0ubuntu19.4 | [aptdaemon 1.1.1+bzr982-0ubuntu19.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-aptdaemon-1.1.1-bzr982-0ubuntu19.4.md) | Sep 23, 2020 |
| Linux | aptdaemon Ubuntu 20.04 LTS (focal) | 1.1.1+bzr982-0ubuntu32.2 | [aptdaemon 1.1.1+bzr982-0ubuntu32.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-aptdaemon-1.1.1-bzr982-0ubuntu32.2.md) | Sep 23, 2020 |
| Linux | aptdaemon-data Ubuntu 18.04.6 LTS (bionic) | 1.1.1+bzr982-0ubuntu19.4 | [aptdaemon-data 1.1.1+bzr982-0ubuntu19.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-aptdaemon-data-1.1.1-bzr982-0ubuntu19.4.md) | Sep 23, 2020 |
| Linux | aptdaemon-data Ubuntu 20.04 LTS (focal) | 1.1.1+bzr982-0ubuntu32.2 | [aptdaemon-data 1.1.1+bzr982-0ubuntu32.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-aptdaemon-data-1.1.1-bzr982-0ubuntu32.2.md) | Sep 23, 2020 |
| Linux | python-aptdaemon Ubuntu 18.04.6 LTS (bionic) | 1.1.1+bzr982-0ubuntu19.4 | [python-aptdaemon 1.1.1+bzr982-0ubuntu19.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-aptdaemon-1.1.1-bzr982-0ubuntu19.4.md) | Sep 23, 2020 |
| Linux | python-aptdaemon.gtk3widgets Ubuntu 18.04.6 LTS (bionic) | 1.1.1+bzr982-0ubuntu19.4 | [python-aptdaemon.gtk3widgets 1.1.1+bzr982-0ubuntu19.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-aptdaemon.gtk3widgets-1.1.1-bzr982-0ubuntu19.4.md) | Sep 23, 2020 |
| Linux | python3-aptdaemon Ubuntu 18.04.6 LTS (bionic) | 1.1.1+bzr982-0ubuntu19.4 | [python3-aptdaemon 1.1.1+bzr982-0ubuntu19.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-aptdaemon-1.1.1-bzr982-0ubuntu19.4.md) | Sep 23, 2020 |
| Linux | python3-aptdaemon Ubuntu 20.04 LTS (focal) | 1.1.1+bzr982-0ubuntu32.2 | [python3-aptdaemon 1.1.1+bzr982-0ubuntu32.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-aptdaemon-1.1.1-bzr982-0ubuntu32.2.md) | Sep 23, 2020 |
| Linux | python3-aptdaemon.gtk3widgets Ubuntu 18.04.6 LTS (bionic) | 1.1.1+bzr982-0ubuntu19.4 | [python3-aptdaemon.gtk3widgets 1.1.1+bzr982-0ubuntu19.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-aptdaemon.gtk3widgets-1.1.1-bzr982-0ubuntu19.4.md) | Sep 23, 2020 |
| Linux | python3-aptdaemon.gtk3widgets Ubuntu 20.04 LTS (focal) | 1.1.1+bzr982-0ubuntu32.2 | [python3-aptdaemon.gtk3widgets 1.1.1+bzr982-0ubuntu32.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-aptdaemon.gtk3widgets-1.1.1-bzr982-0ubuntu32.2.md) | Sep 23, 2020 |
| Linux | python3-aptdaemon.test Ubuntu 18.04.6 LTS (bionic) | 1.1.1+bzr982-0ubuntu19.4 | [python3-aptdaemon.test 1.1.1+bzr982-0ubuntu19.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-aptdaemon.test-1.1.1-bzr982-0ubuntu19.4.md) | Sep 23, 2020 |
| Linux | python3-aptdaemon.test Ubuntu 20.04 LTS (focal) | 1.1.1+bzr982-0ubuntu32.2 | [python3-aptdaemon.test 1.1.1+bzr982-0ubuntu32.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-aptdaemon.test-1.1.1-bzr982-0ubuntu32.2.md) | Sep 23, 2020 |

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