HP-UX 11.00 crontab allows local users to read arbitrary files via the -e option by creating a symlink to the target file during the crontab session, quitting the session, and reading the error messages that crontab generates.

References

• https://nvd.nist.gov/vuln/detail/CVE-2000-0972
• https://exchange.xforce.ibmcloud.com/vulnerabilities/5410
• http://archives.neohapsis.com/archives/bugtraq/2000-10/0317.html