Vulnerabilities in pkg:nuget/Amazon.IonDotnet

PACKAGE
Advisory Identifier: GHSA-gm2p-wf5c-w3pj
Share
Advisory Summary

CVE-2025-3857 is a HIGH (CVSS 7.5) infinite loop condition vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Amazon.IonDotnet libraries in the NuGet ecosystem. The issue involves infinite loop condition in amazon.iondotnet. Remediation is available by upgrading affected packages to version 1.3.1.

2 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:nuget/Amazon.IonDotnet

2 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:nuget/Amazon.IonDotnet. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-gm2p-wf5c-w3pj CVE-2025-3857 HIGH Infinite loop condition in Amazon.IonDotnet
GHSA-q5r6-9qwq-g2wj CVE-2025-11573 HIGH Amazon.IonDotnet is vulnerable to Denial of Service attacks

CVE-2025-3857 at a Glance

CVE Identifier CVE-2025-3857
GHSA Identifier GHSA-gm2p-wf5c-w3pj
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Amazon.IonDotnet
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2025-3857

To remediate this vulnerability, upgrade all affected Amazon.IonDotnet dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Amazon.IonDotnet fixed: 1.3.1 
Upgrade Amazon.IonDotnet to 1.3.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for Amazon.IonDotnet

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-3857, inspect your project dependencies for Amazon.IonDotnet:

inspect dependencies for Amazon.IonDotnet

Analyze the terminal output to locate any version of Amazon.IonDotnet in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.3.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Amazon.IonDotnet, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary [Amazon.IonDotnet (ion-dotnet)](https://github.com/amazon-ion/ion-dotnet) is a .NET library with an implementation of the [Ion data serialization format](https://amazon-ion.github.io/ion-docs/). An issue exists in Amazon.IonDotnet and the RawBinaryReader class where, under certain conditions, an actor could trigger an infinite loop condition. ## Impact 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. **Impacted versions: <=1.3.0** ## Patches This issue has been addressed in Amazon.IonDotnet version [1.3.1](https://github.com/amazon-ion/ion-dotnet/releases/tag/v1.3.1). We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes. ## Workarounds There are no workarounds. Upgrade to version 1.3.1. ## References If you have any questions or comments about this advisory, contact AWS/Amazon Security via our [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue. ## Credit We would like to thank Josh Coleman from Symbotic for collaborating on this issue through the coordinated vulnerability disclosure process.

CVE-2025-3857 Affected Amazon.IonDotnet Versions

1 component(s)
Fixed Versions:
1.3.1
Product / Package Ecosystem Affected Versions Fixed Version
Amazon.IonDotnet
nuget/Amazon.IonDotnet
NuGet
< 1.3.1
1.3.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/amazon-ion/ion-dotnet/security/advisories/GHSA-gm2p-wf5c-w3pj
NVD — CVE-2025-3857 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-3857
Security Fix Commit FIX COMMIT
https://github.com/amazon-ion/ion-dotnet/commit/34a4f5215eceac1bb7bf434c4f2310d64d1b703b
Amazon.IonDotnet Security Information SECURITY
https://aws.amazon.com/security/security-bulletins/AWS-2025-009
Amazon.IonDotnet Source Repository REPOSITORY
https://github.com/amazon-ion/ion-dotnet
Amazon.IonDotnet Release RELEASE
https://github.com/amazon-ion/ion-dotnet/releases/tag/v1.3.1

Frequently Asked Questions

What is CVE-2025-3857?
CVE-2025-3857 is a security vulnerability in Amazon.IonDotnet involving Infinite loop condition in Amazon.IonDotnet under CWE-502: Deserialization of Untrusted Data.
Which Amazon.IonDotnet versions are affected?
Affected versions include releases prior to 1.3.1 across affected packages: Amazon.IonDotnet.
What version fixes CVE-2025-3857?
Upgrading to 1.3.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Amazon.IonDotnet affected?
Yes, Amazon.IonDotnet is affected in releases prior to 1.3.1. Upgrade your dependency to 1.3.1 or later.
What is the CVSS score of CVE-2025-3857?
CVE-2025-3857 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2025-3857?
CVE-2025-3857 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check NuGet dependencies for CVE-2025-3857?
Run the dependency tree command: 'inspect dependencies for Amazon.IonDotnet'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gm2p-wf5c-w3pj",
  "modified" : "2025-10-14T21:59:16Z",
  "published" : "2025-04-21T16:19:20Z",
  "aliases" : [ "CVE-2025-3857" ],
  "summary" : "Infinite loop condition in Amazon.IonDotnet",
  "details" : "## Summary\n\n[Amazon.IonDotnet (ion-dotnet)](https://github.com/amazon-ion/ion-dotnet) is a .NET library with an implementation of the [Ion data serialization format](https://amazon-ion.github.io/ion-docs/).\n\nAn issue exists in Amazon.IonDotnet and the RawBinaryReader class where, under certain conditions, an actor could trigger an infinite loop condition.\n\n## Impact\n\nWhen 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.\n\n**Impacted versions: <=1.3.0**\n\n## Patches\n\nThis issue has been addressed in Amazon.IonDotnet version [1.3.1](https://github.com/amazon-ion/ion-dotnet/releases/tag/v1.3.1). We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.\n\n## Workarounds\n\nThere are no workarounds. Upgrade to version 1.3.1.\n\n## References\n\nIf you have any questions or comments about this advisory, contact AWS/Amazon Security via our [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.\n\n## Credit\n\nWe would like to thank Josh Coleman from Symbotic for collaborating on this issue through the coordinated vulnerability disclosure process.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Amazon.IonDotnet"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.3.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/amazon-ion/ion-dotnet/security/advisories/GHSA-gm2p-wf5c-w3pj"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-3857"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/amazon-ion/ion-dotnet/commit/34a4f5215eceac1bb7bf434c4f2310d64d1b703b"
  }, {
    "type" : "WEB",
    "url" : "https://aws.amazon.com/security/security-bulletins/AWS-2025-009"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/amazon-ion/ion-dotnet"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/amazon-ion/ion-dotnet/releases/tag/v1.3.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502", "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-04-21T16:19:20Z",
    "nvd_published_at" : "2025-04-21T16:15:54Z"
  }
}