Headline
CVE-2022-3064: Release v2.2.4: Improve heuristics preventing CPU/memory abuse (#515) · go-yaml/yaml
Parsing malicious or large YAML documents can consume excessive amounts of CPU or memory.
This addresses the following items:
==== Parse time of excessively deep nested or indented documents
Parsing these documents is non-linear; limiting stack depth to 10,000 keeps parse times of pathological documents sub-second (~.25 seconds in benchmarks)
==== Alias node expansion limits
The current limit allows 10,000% expansion, which is too permissive for large documents.
Limiting to 10% expansion for larger documents allows callers to use input size as an effective way to limit resource usage. Continuing to allow larger expansion rates (up to the current 10,000% limit) for smaller documents does not unduly affect memory use.
This change bounds decode operations from alias expansion to ~400,000 operations for small documents (worst-case ~100-150MB) or 10% of the input document for large documents, whichever is greater.
Assets 2
2019-10-02T18:33:36Z
2019-10-02T18:33:36Z
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Parsing malicious or large YAML documents can consume excessive amounts of CPU or memory.