Ismaël Mejía created AVRO-4293:
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Summary: [c] Validate available bytes before allocating for
length-prefixed values
Key: AVRO-4293
URL: https://issues.apache.org/jira/browse/AVRO-4293
Project: Apache Avro
Issue Type: Sub-task
Components: c
Affects Versions: 1.12.1, 1.11.5
Reporter: Ismaël Mejía
Fix For: 1.11.6, 1.12.2, 1.13.0
A bytes or string value is encoded as a length prefix followed by that many
bytes of data. A malicious or truncated input can declare a very large length
while carrying little or no actual data, causing a large buffer to be allocated
before the shortfall is noticed. When the source can report how many bytes
remain, reject a declared length that exceeds the bytes actually available
before allocating for it. Companion to AVRO-4241 (Java).
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