CVE-2020-15899: Grin Grin Insufficient Data Validation Vulnerability

HIGH
Advisory Identifier: GHSA-p75g-gcv5-42qg
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CVSS 7.5
CWE-345
Published
Advisory Summary

CVE-2020-15899 is a HIGH (CVSS 7.5) grin insufficient data validation vulnerability (CWE-345: Insufficient Verification of Data Authenticity) affecting Grin libraries in the crates.io ecosystem. The issue involves grin insufficient data validation. Remediation is available by upgrading affected packages to version 4.0.0.

CVE-2020-15899 at a Glance

CVE Identifier CVE-2020-15899
GHSA Identifier GHSA-p75g-gcv5-42qg
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-345: Insufficient Verification of Data Authenticity
Affected Product Grin
Package Ecosystem crates.io
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-2020-15899

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

grin fixed: 4.0.0 
Upgrade grin to 4.0.0
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 grin

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-15899, inspect your project dependencies for Grin:

inspect dependencies for grin

Analyze the terminal output to locate any version of Grin in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.0.0), 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-345: Insufficient Verification of Data Authenticity, where the product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. In Grin, 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

Grin 3.0.0 before 4.0.0 has insufficient validation of data related to Mimblewimble.

CVE-2020-15899 Affected Grin Versions

1 component(s)
Fixed Versions:
4.0.0
Product / Package Ecosystem Affected Versions Fixed Version
grin
 crates.io
≥ 3.0.0
< 4.0.0
4.0.0

References

NVD — CVE-2020-15899 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15899
Grin Source Repository REPOSITORY
https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-15899.md
Grin Source Repository REPOSITORY
https://github.com/mimblewimble/grin/compare/v3.1.1...v4.0.0

Frequently Asked Questions

What is CVE-2020-15899?
CVE-2020-15899 is a security vulnerability in Grin involving Grin insufficient data validation under CWE-345: Insufficient Verification of Data Authenticity.
Which Grin versions are affected?
Affected versions include releases prior to 4.0.0 across affected packages: grin.
What version fixes CVE-2020-15899?
Upgrading to 4.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is grin affected?
Yes, grin is affected in releases prior to 4.0.0. Upgrade your dependency to 4.0.0 or later.
What is the CVSS score of CVE-2020-15899?
CVE-2020-15899 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-2020-15899?
CVE-2020-15899 is classified under CWE-345: Insufficient Verification of Data Authenticity (The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.).
How can I check crates.io dependencies for CVE-2020-15899?
Run the dependency tree command: 'inspect dependencies for grin'. 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-p75g-gcv5-42qg",
  "modified" : "2024-02-01T21:47:51Z",
  "published" : "2022-05-24T17:24:33Z",
  "aliases" : [ "CVE-2020-15899" ],
  "summary" : "Grin insufficient data validation",
  "details" : "Grin 3.0.0 before 4.0.0 has insufficient validation of data related to Mimblewimble.",
  "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" : "crates.io",
      "name" : "grin"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "4.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-15899"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-15899.md"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mimblewimble/grin/compare/v3.1.1...v4.0.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-345" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-02-01T21:47:51Z",
    "nvd_published_at" : "2020-07-28T18:15:00Z"
  }
}