Common Attack Pattern Enumeration and Classification
A Community Resource for Identifying and Understanding Attacks
An attack of this type involves an adversary inserting malicious characters (such as a XSS redirection) into a filename, directly or indirectly that is then used by the target software to generate HTML text or other potentially executable content. Many websites rely on user-generated content and dynamically build resources like files, filenames, and URL links directly from user supplied data. In this attack pattern, the attacker uploads code that can execute in the client browser and/or redirect the client browser to a site that the attacker owns. All XSS attack payload variants can be used to pass and exploit these vulnerabilities.
Phishing attacks rely on a user clicking on links on that are supplied to them by attackers masquerading as a trusted resource such as a bank or online auction site. The end user's email client hosts the supplied resource name in this case via email. The resource name, however may either 1) direct the client browser to a malicious site to steal credentials and/or 2) execute code on the client machine to probe the victim's host system and network environment.
Skill or Knowledge Level: Low
To achieve a redirection and use of less trusted source, an attacker can simply edit data that the host uses to build the filename
Skill or Knowledge Level: Medium
Deploying a malicious "look-a-like" site (such as a site masquerading as a bank or online auction site) that the user enters their authentication data into.
Skill or Knowledge Level: High
Exploiting a client side vulnerability to inject malicious scripts into the browser's executable process.
Design: Use browser technologies that do not allow client side scripting.
Implementation: Ensure all content that is delivered to client is sanitized against an acceptable content specification.
Implementation: Perform input validation for all remote content.
Implementation: Perform output validation for all remote content.
Implementation: Scan dynamically generated content against validation specification
Enables attacker to execute server side code with any commands that the program owner has privileges to.
[R.73.1] [REF-2] G. Hoglund and G. McGraw. "Exploiting Software: How to Break Code". Addison-Wesley. February 2004.
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