Roman Veretelnikov has reported a security issue in Vixie Cron, which potentially can be exploited by malicious, local users to perform certain actions with escalated privileges.
The security issue is caused due to missing checks for whether the "setuid()" call has succeeded before running a job submitted by a user. This may cause the user's job to run with root privileges if the "setuid()" fails due to e.g. PAM failures or resource limits.
The security issue has been reported in version 4.1. Other versions may also be affected.
Solution: Restrict the use of cron to trusted users only.
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