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Elixir protobuf is a pure Elixir implementation of Google Protobuf. From 0.8.0 until 0.16.1, services that decode attacker-controlled protobuf bytes with Protobuf.Decoder can be taken offline when the schema contains a self-referential or cyclic message type. In lib/protobuf/decoder.ex, Protobuf.Decoder.value_for_field/3 handles an embedded?: true field by recursively entering the decode / build_message / handle_value / value_for_field call chain without enforcing a nesting-depth limit. Deeply nested embedded fields retain non-tail recursive frames, allowing a comparatively small request to consume substantial CPU and memory, pin a BEAM scheduler, and exhaust the node. This issue is fixed in version 0.16.1.
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Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "elixir-protobuf",
"product": "protobuf",
"versions": [
{
"version": ">= 0.8.0, < 0.16.1",
"status": "affected"
}
]
}Original source record · Cite this exact observation · Complete original publisher JSON