cve/2023/CVE-2023-37475.md

### [CVE-2023-37475](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-37475)
![](https://img.shields.io/static/v1?label=Product&message=avro&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3C%202.13.0%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-400%3A%20Uncontrolled%20Resource%20Consumption&color=brighgreen)

### Description

Hamba avro is a go lang encoder/decoder implementation of the avro codec specification. In affected versions a well-crafted string passed to avro's `github.com/hamba/avro/v2.Unmarshal()` can throw a `fatal error: runtime: out of memory` which is unrecoverable and can cause denial of service of the consumer of avro. The root cause of the issue is that avro uses part of the input to `Unmarshal()` to determine the size when creating a new slice and hence an attacker may consume arbitrary amounts of memory which in turn may cause the application to crash. This issue has been addressed in commit `b4a402f4` which has been included in release version `2.13.0`. Users are advised to upgrade. There are no known workarounds for this vulnerability.

### POC

#### Reference
- https://github.com/hamba/avro/security/advisories/GHSA-9x44-9pgq-cf45

#### Github
No PoCs found on GitHub currently.