billion laughs

名词 n.

英文释义

名词 n.
  1. A type of denial-of-service attack which is aimed at parsers of XML documents, based on defining entities that expand to large numbers of copies of other entities. plural,plural-only
    — The XML billion laughs DoS attack simply starts by declaring an XML document with an entity named lol (hence the name laugh gets associated with it, but in a general case it can be any valid name).

词源

In the most frequently cited example of such an attack, the first entity is the string lol (“laugh out loud”).
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