userhelper in the usermode package on Red Hat Linux executes non-setuid programs as root, which does not activate the security measures in glibc and allows the programs to be exploited via format string vulnerabilities in glibc via the LANG or LC_ALL environment variables (CVE-2000-0844).
The line printer daemon (lpd) in the lpr package in multiple Linux operating systems allows local users to gain root privileges by causing sendmail to execute with arbitrary command line arguments, as demonstrated using the -C option to specify a configuration file.
gzexe in the gzip package on Red Hat Linux 5.0 and earlier allows local users to overwrite files of other users via a symlink attack on a temporary file.
automatic download option in ncftp 2.4.2 FTP client in Red Hat Linux 5.0 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in the names of files that are to be downloaded.
snmpd server in cmu-snmp SNMP package before 3.3-1 in Red Hat Linux 4.0 is configured to allow remote attackers to read and write sensitive information.