The issue concerns a command matching functionality problem in sudo, where a file in the current working directory with the same name as a pseudo-command in the sudoers file can be exploited if the PATH contains an entry for ".". This allows local users to execute arbitrary commands via a Trojan horse executable. For example, this can be demonstrated using `sudoedit`. The exploitation of this issue can lead to a breach of confidentiality, integrity, and availability of protected information.