Antivirus software products typically provide stellar examples of failing blacklists. A blacklist is also considered easy for a hacker to bypass. Using a blacklist to this end is not recommended, as it is difficult to configure properly. The problem here is that the attacker can inject commands to hijack clients’ browsers, resulting in loss of data.Īnything that your application receives from an untrusted source must be filtered, preferably according to a whitelist. Injection flaws can happen when we pass unfiltered data to the SQL server (SQL injection), to the browser ( via Cross Site Scripting), to the LDAP server (LDAP injection), or anywhere else. Injection flaws result from a classic failure to filter untrusted input. With this in mind, let’s explore 10 common internet vulnerability issues. Stated another way, authentication is knowing who an entity is, while authorization is what a given entity can do.
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