script command in the util-linux package before 2.11n allows local users to overwrite arbitrary files by setting a hardlink from the typescript log file to any file on the system, then having root execute the script command.

References

• https://nvd.nist.gov/vuln/detail/CVE-2001-1494
• https://exchange.xforce.ibmcloud.com/vulnerabilities/7718
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10723
• http://seclists.org/bugtraq/2001/Dec/0122.html
• http://seclists.org/bugtraq/2001/Dec/0123.html
• http://secunia.com/advisories/16785
• http://secunia.com/advisories/18502
• http://support.avaya.com/elmodocs2/security/ASA-2006-014.htm
• http://www.redhat.com/support/errata/RHSA-2005-782.html
• http://www.securityfocus.com/bid/16280