Vulnerability Description
When reading binary Ion data through Amazon.IonDotnet using the RawBinaryReader class, Amazon.IonDotnet does not check the number of bytes read from the underlying stream while deserializing the binary format. If the Ion data is malformed or truncated, this triggers an infinite loop condition that could potentially result in a denial of service. Users should upgrade to Amazon.IonDotnet version 1.3.1 and ensure any forked or derivative code is patched to incorporate the new fixes.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://aws.amazon.com/security/security-bulletins/AWS-2025-009/
- https://github.com/amazon-ion/ion-dotnet/releases/tag/v1.3.1
- https://github.com/amazon-ion/ion-dotnet/security/advisories/GHSA-gm2p-wf5c-w3pj
FAQ
What is CVE-2025-3857?
CVE-2025-3857 is a vulnerability with a CVSS score of 7.5 (HIGH). When reading binary Ion data through Amazon.IonDotnet using the RawBinaryReader class, Amazon.IonDotnet does not check the number of bytes read from the underlying stream while deserializing the binar...
How severe is CVE-2025-3857?
CVE-2025-3857 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-3857?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.