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..This CVE has a CVSS3.1 score of 7.5 and a Base Severity of HIGH.
| Info | Details |
|---|---|
| CVE ID | CVE-2023-37475 |
| CVE State | PUBLISHED |
| BaseScore | 7.5 |
| BaseSeverity | HIGH |
| VectorString | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Version | NA |
References for CVE-2023-37475 :
https://github.com/hamba/avro/security/advisories/GHSA-9×44-9pgq-cf45
https://github.com/hamba/avro/commit/b4a402f41cf44b6094b5131286830ba9bb1eb290
| Metric Type | Metric Score |
|---|---|
| AttackVector(AV) | NETWORK |
| AttackComplexity(AC) | LOW |
| PrivilegesRequired(PR) | NONE |
| UserInteraction(UI) | NONE |
| Scope(S) | UNCHANGED |
| Confidentiality(C) | NONE |
| Availability(A) | HIGH |
| Integrity(I) | NONE |