An XML External Entity attack is a type of attack against an application that parses XML input. This attack occurs when XML input containing a reference to an external entity is processed by a weakly configured XML parser. This attack may lead to the disclosure of confidential data, denial of service, port scanning from the perspective of the machine where the parser is located.
This zipped Ubuntu VM is set up as a Capture the Flag with those that successfully exploit the XXE vulnerability able to place their name on a leaderboard. As with other challenges in the OWASP Vicnum project the overall purpose is to have fun and generate interest in the topic. This challenge was used in an OWASP APPSEC 'Breaking Bad' event.
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