CVE-2023-37475

Public Exploit
Attacker-controlled parameter can cause denial of service in hamba avro

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.29%
Vendor Advisory github.com
Affected: hamba avro
Published at:
Updated at:

References

Link Tags
https://github.com/hamba/avro/security/advisories/GHSA-9x44-9pgq-cf45 vendor advisory exploit
https://github.com/hamba/avro/commit/b4a402f41cf44b6094b5131286830ba9bb1eb290 patch

Frequently Asked Questions

What is the severity of CVE-2023-37475?
CVE-2023-37475 has been scored as a high severity vulnerability.
How to fix CVE-2023-37475?
To fix CVE-2023-37475, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-37475 being actively exploited in the wild?
It is possible that CVE-2023-37475 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-37475?
CVE-2023-37475 affects hamba avro.
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