CVE-2004-1031
HighSummary
Vulnerability in 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.
Risk Assessment
The risk involves potential privilege escalation by a local user, which could lead to unauthorized execution of cron jobs with root privileges.
Recommendation
It is recommended to update Fcron to a version where this vulnerability is fixed, and to restrict access to /proc files for unprivileged users.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS