fcronsighup in Fcron 2.0.1, 2.9.4, and possibly earlier versions allows local users to bypass access restrictions and load an arbitrary configuration file by starting an suid process and pointing the fcronsighup configuration file to a /proc entry that is owned by root but modifiable by the user, such as /proc/self/cmdline or /proc/self/environ.
CVSS Details
- CVSS 3.1 Base Score: 7.8
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade fcron | Dec 10, 2025 | Jan 21, 2005 |
| Gentoo Linux | — | Upgrade sys-process/fcron. | Oct 30, 2017 | Mar 1, 2005 |
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