registrar in the HP resource monitor service allows local users to read and modify arbitrary files by renaming the original registrar.log log file and creating a symbolic link to the target file, to which registrar appends log information and sets the permissions to be world readable.
Multiple shell programs on various Unix systems, including (1) tcsh, (2) csh, (3) sh, and (4) bash, follow symlinks when processing << redirects (aka here-documents or in-here documents), which allows local users to overwrite files of other users via a symlink attack.
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.
Format string vulnerability in ftpd in HP-UX 10.20 allows remote attackers to cause a denial of service or execute arbitrary commands via format strings in the PASS command.
The net.init rc script in HP-UX 11.00 (S008net.init) allows local users to overwrite arbitrary files via a symlink attack that points from /tmp/stcp.conf to the targeted file.