CVE-2020-1469: Bond.Core.CSharp Infinite Loop Vulnerability

HIGH
Advisory Identifier: GHSA-rqrc-8q8f-cp9c
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CVSS 7.5
CWE-434 CWE-835
Published
Advisory Summary

CVE-2020-1469 is a HIGH (CVSS 7.5) infinite loop vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Bond.Core.CSharp libraries in the NuGet ecosystem. The issue involves infinite loop in .net bond. Remediation is available by upgrading affected packages to version 9.0.1.

CVE-2020-1469 at a Glance

CVE Identifier CVE-2020-1469
GHSA Identifier GHSA-rqrc-8q8f-cp9c
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Bond.Core.CSharp
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-2020-1469

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

Bond.Core.CSharp fixed: 9.0.1 
Upgrade Bond.Core.CSharp to 9.0.1
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 Bond.Core.CSharp

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-1469, inspect your project dependencies for Bond.Core.CSharp:

inspect dependencies for Bond.Core.CSharp

Analyze the terminal output to locate any version of Bond.Core.CSharp in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.0.1), 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-434: Unrestricted Upload of File with Dangerous Type, where the product allows the upload or transfer of dangerous file types that are automatically processed within its environment. In Bond.Core.CSharp, 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

A denial of service vulnerability exists when the .NET implementation of Bond improperly parses input, aka 'Bond Denial of Service Vulnerability'. Handling of large container lengths that could cause an infinite loop when deserializing some payloads.

CVE-2020-1469 Affected Bond.Core.CSharp Versions

1 component(s)
Fixed Versions:
9.0.1
Product / Package Ecosystem Affected Versions Fixed Version
Bond.Core.CSharp
nuget/Bond.Core.CSharp
NuGet
≥ 3.0.0
< 9.0.1
9.0.1

References

NVD — CVE-2020-1469 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-1469
Security Fix Commit FIX COMMIT
https://github.com/microsoft/bond/commit/3afea822c42dd0095fedb9e7db9ebb99165e7343
Security Fix Commit FIX COMMIT
https://github.com/microsoft/bond/commit/b0fd4a15a7cae946dd2855122559ca59cc34dbea
Bond.Core.CSharp Source Repository REPOSITORY
https://github.com/microsoft/bond
msrc.microsoft.com/update-guide/en-us/... WEB
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2020-1469
Bond.Core.CSharp Security Information SECURITY
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1469
www.nuget.org/packages/bond.core.... WEB
https://www.nuget.org/packages/Bond.Core.CSharp/9.0.1

Frequently Asked Questions

What is CVE-2020-1469?
CVE-2020-1469 is a security vulnerability in Bond.Core.CSharp involving Infinite loop in .Net Bond under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Bond.Core.CSharp versions are affected?
Affected versions include releases prior to 9.0.1 across affected packages: Bond.Core.CSharp.
What version fixes CVE-2020-1469?
Upgrading to 9.0.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Bond.Core.CSharp affected?
Yes, Bond.Core.CSharp is affected in releases prior to 9.0.1. Upgrade your dependency to 9.0.1 or later.
What is the CVSS score of CVE-2020-1469?
CVE-2020-1469 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-2020-1469?
CVE-2020-1469 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).
How can I check NuGet dependencies for CVE-2020-1469?
Run the dependency tree command: 'inspect dependencies for Bond.Core.CSharp'. 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-rqrc-8q8f-cp9c",
  "modified" : "2022-04-08T18:11:51Z",
  "published" : "2022-04-08T18:11:51Z",
  "aliases" : [ "CVE-2020-1469" ],
  "summary" : "Infinite loop in .Net Bond",
  "details" : "A denial of service vulnerability exists when the .NET implementation of Bond improperly parses input, aka 'Bond Denial of Service Vulnerability'. Handling of large container lengths that could cause an infinite loop when deserializing some payloads.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Bond.Core.CSharp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "9.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-1469"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/microsoft/bond/commit/3afea822c42dd0095fedb9e7db9ebb99165e7343"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/microsoft/bond/commit/b0fd4a15a7cae946dd2855122559ca59cc34dbea"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/microsoft/bond"
  }, {
    "type" : "WEB",
    "url" : "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2020-1469"
  }, {
    "type" : "WEB",
    "url" : "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1469"
  }, {
    "type" : "WEB",
    "url" : "https://www.nuget.org/packages/Bond.Core.CSharp/9.0.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434", "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-04-08T18:11:51Z",
    "nvd_published_at" : null
  }
}