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Defensive programming is a form of defensive design intended to develop programs that are capable of detecting potential security abnormalities and make predetermined responses. [1] It ensures the continuing function of a piece of software under unforeseen circumstances.
Anna Kournikova, namesake of the virus. The virus was created by 20-year-old Dutch student Jan de Wit, who used the pseudonym "OnTheFly", on 11 February 2001. [2] It was designed to trick email users into opening an email attachment, ostensibly an image of Russian tennis player Anna Kournikova but instead hiding a malicious program.
The VBScript language is modeled on classic Visual Basic. [13] Notable features include: A "procedure" is the main construct in VBScript for separating code into smaller modules. VBScript distinguishes between a function, which can return a result in an assignment statement, and a subroutine, which cannot.
The Java software platform provides a number of features designed for improving the security of Java applications. This includes enforcing runtime constraints through the use of the Java Virtual Machine (JVM), a security manager that sandboxes untrusted code from the rest of the operating system, and a suite of security APIs that Java developers can utilise.
Code injection may be done with good intentions. For example, changing or tweaking the behavior of a program or system through code injection can cause the system to behave in a certain way without malicious intent. [5] [6] Code injection could, for example:
In a return-into-library attack, an attacker hijacks program control flow by exploiting a buffer overrun vulnerability, exactly as discussed above. Instead of attempting to write an attack payload onto the stack, the attacker instead chooses an available library function and overwrites the return address with its entry location.
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In computer security, heap spraying is a technique used in exploits to facilitate arbitrary code execution.The part of the source code of an exploit that implements this technique is called a heap spray. [1]