7.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2022-35724

CVE-2022-35724: Apache Avro Rust SDK vulnerable to reader looping in cycle endlessly, consuming CPU

It is possible to provide data to be read that leads the reader to loop in cycles endlessly, consuming CPU. This issue affects Rust applications using Apache Avro Rust SDK prior to 0.14.0 (previously known as avro-rs). Users should update to apache-avro version 0.14.0 which addresses this issue.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2022-35724

CVE-2022-35724:

7.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
apache-avro	rust	< 0.14.0	0.14.0

Technical Details

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Root Cause Analysis

The vulnerability (CWE-835) involves an infinite loop during data deserialization. The Avro Rust SDK's reader component is responsible for parsing structured data, and functions handling block iteration (read_block) or schema-aware decoding (next) are prime candidates. The read_block function likely reads a count of elements from untrusted input; a malicious count (e.g., via a negative varint decoded as a large u64) could force an unreasonably long loop. Similarly, next might mishandle cyclic schemas or malformed data, causing indefinite re-entry into parsing logic. While the exact code is unavailable, the described behavior and Avro's structure strongly suggest these functions as the source. Confidence is medium due to reliance on common deserialization patterns rather than explicit patch analysis.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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