CVE-2023-37475
HighCVSS 7.5Exploitation Probability (EPSS)
Elevated risk52th percentile - higher than 52% of all known CVEs
Summary
Hamba avro is a Go language encoder/decoder implementation of the avro codec specification. In affected versions, a well-crafted string passed to `github.com/hamba/avro/v2.Unmarshal()` can throw a `fatal error: runtime: out of memory`, leading to denial of service for the avro consumer.
Risk Assessment
An attacker may exploit this vulnerability to consume arbitrary amounts of memory, potentially causing the application to crash. This poses a significant risk to the availability of services using avro.
Recommendation
It is recommended to upgrade to version `2.13.0` or later to mitigate this vulnerability. There are no known workarounds for this issue.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

