CVE-2017-9525

NameCVE-2017-9525
DescriptionIn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: local)
Debian Bugs864466

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
cron (PTS)wheezy3.0pl1-124vulnerable
jessie3.0pl1-127+deb8u1vulnerable
stretch, buster, sid3.0pl1-128vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
cronsource(unstable)(unfixed)medium864466

Notes

[stretch] - cron <no-dsa> (Minor issue)
[jessie] - cron <no-dsa> (Minor issue)
[wheezy] - cron <no-dsa> (Minor issue)
http://www.openwall.com/lists/oss-security/2017/06/08/3

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