Link Following The advisory has been revoked - it doesn't affect any version of package cron (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1910-CRON-653176
- published9 Jun 2017
- disclosed9 Jun 2017
Introduced: 9 Jun 2017
CVE-2017-9525 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:19.10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream cron package and not the cron package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-9525
- http://bugs.debian.org/864466
- https://lists.debian.org/debian-lts-announce/2019/03/msg00025.html
- https://security-tracker.debian.org/tracker/CVE-2017-9525
- http://www.openwall.com/lists/oss-security/2017/06/08/3
- http://www.securitytracker.com/id/1038651
- https://lists.debian.org/debian-lts-announce/2021/10/msg00029.html