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Using the POSIX function open() to create a file but failing to provide access permissions for that file may cause that file to be created unintended access permissions. Neglecting to properly specify file access permissions when using open() has been known to lead to vulnerabilities; for instance, such as CVE-2006-1174.
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int fd = open(file_name, O_CREAT | O_WRONLY); /* mode is missing */
if (fd == -1){
/* Handle Error */
}
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