Description
incron 0.5.5 does not initialize supplementary groups when running a process from a user's incrontabs, which causes the process to be run with the incrond supplementary groups and allows local users to gain privileges via an incrontab table.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | incron | 0.5.7-1 | — |
| Debian 13 | incron | 0.5.7-1 | — |
| Debian 12 | incron | 0.5.7-1 | — |