While performing a security assessment on a serverless-only architecture, you notice that the public REST endpoint of a cloud function can be invoked without authentication. An attacker could script millions of requests, forcing the provider to spawn large numbers of short-lived instances and bill the victim for every execution. What specific threat does this scenario illustrate in serverless computing?
In serverless environments, the cost model is based on the number of invocations and execution time. Flooding an unauthenticated function with automated requests drives up compute usage and charges, exhausting the organization's budget rather than system resources. This threat is referred to as a Denial of Wallet attack. It differs from a traditional Denial of Service, which aims to exhaust capacity; cold-start abuse relates to latency, and container escape targets the sandbox rather than financial impact.
Ask Bash
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What distinguishes a Denial of Wallet attack from a classic Denial of Service (DoS)?
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How can authentication mitigate Denial of Wallet attacks in serverless computing?
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What is cold-start in serverless computing, and why is it different from a Denial of Wallet attack?
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Why is security especially critical in serverless architectures?
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How can you safeguard against Denial of Wallet attacks?
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How does a Denial of Wallet attack differ from a classic Denial of Service (DoS) attack?
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