# CVE-2017-9525: cron: In the cron package through 3.0pl1-128 on Debian, and through 3.0pl1-128ubuntu2 on Ubuntu, the postinst maintainer sc...

CVE-2017-9525 is fixed in cron on 1 platform by cron 3.0pl1-128.1ubuntu1.2 (version 3.0pl1-128.1ubuntu1.2), released June 9, 2017. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-9525
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0055
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 9, 2017

## Description

In the cron package through 3.0pl1-128 on Debian, and through 3.0pl1-128ubuntu2 on Ubuntu, the postinst maintainer script allows for group-crontab-to-root privilege escalation via symlink attacks against unsafe usage of the chown and chmod programs.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cron Ubuntu 18.04.6 LTS (bionic) | 3.0pl1-128.1ubuntu1.2 | [cron 3.0pl1-128.1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-cron-3.0pl1-128.1ubuntu1.2.md) | Jun 9, 2017 |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo