Wasmtime WASI implementations are vulnerable to guest-controlled resource exhaustion
Wasmtime's implementation of WASI host interfaces are susceptible to guest-controlled resource exhaustion on the host. Wasmtime did not appropriately place limits on resource allocations requested by the guests. This serves as a Denial of Service vector where a guest can induce a range of crashing behaviors on the host such as: Allocating arbitrarily large amounts of host memory. Causing an allocation failure on the host, which in Rust defaults to …