Vulnerability in Cron Project
CVE-2017-9525
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Cron Project
- Canonical Ubuntu Linux
- Debian Linux — versions 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.debian.org/864466 (Third Party Advisory, Issue Tracking, Vendor Advisory)
- www.openwall.com/lists/oss-security/2017/06/08/3 (Mailing List, Third Party Advisory)
- www.securitytracker.com/id/1038651 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.debian.org/debian-lts-announce/2019/03/msg00025.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/10/msg00029.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-9525?
- CVE-2017-9525 is a medium-severity vulnerability in Cron Project, classified under Improper Link Resolution Before File Access. CVSS score: 6.7/10. Published 2017-06-09.
- How severe is CVE-2017-9525?
- Medium severity. CVSS v3 base score is 6.7 out of 10.
- Is CVE-2017-9525 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.