CVE-2020-12439: Grin Grin Allows Attackers To Adversely Vulnerability

MODERATE
Advisory Identifier: GHSA-6x52-88cq-55q5
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CVSS 5.3
Published
Advisory Summary

CVE-2020-12439 is a MODERATE (CVSS 5.3) grin allows attackers to adversely vulnerability (General Security Weakness) affecting Grin libraries in the crates.io ecosystem. The issue involves grin allows attackers to adversely affect availability of data on a mimblewimble blockchain. Remediation is available by upgrading affected packages to version 3.1.0.

CVE-2020-12439 at a Glance

CVE Identifier CVE-2020-12439
GHSA Identifier GHSA-6x52-88cq-55q5
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification General Security Weakness
Affected Product Grin
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:L).

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 Low (A:L)

How to Fix CVE-2020-12439

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: 3.1.0 
Upgrade grin to 3.1.0
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-2020-12439, 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 3.1.0), 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 General Security Weakness. 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 before 3.1.0 allows attackers to adversely affect availability of data on a Mimblewimble blockchain.

CVE-2020-12439 Affected Grin Versions

1 component(s)
Fixed Versions:
3.1.0
Product / Package Ecosystem Affected Versions Fixed Version
grin
 crates.io
< 3.1.0
3.1.0

References

NVD — CVE-2020-12439 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-12439
Grin Source Repository REPOSITORY
https://github.com/mimblewimble/grin/issues/3235
Grin Source Repository REPOSITORY
https://github.com/mimblewimble/grin/pull/3236
Grin Source Repository REPOSITORY
https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-12439.md

Frequently Asked Questions

What is CVE-2020-12439?
CVE-2020-12439 is a security vulnerability in Grin involving Grin allows attackers to adversely affect availability of data on a Mimblewimble blockchain under General Security Weakness.
Which Grin versions are affected?
Affected versions include releases prior to 3.1.0 across affected packages: grin.
What version fixes CVE-2020-12439?
Upgrading to 3.1.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is grin affected?
Yes, grin is affected in releases prior to 3.1.0. Upgrade your dependency to 3.1.0 or later.
What is the CVSS score of CVE-2020-12439?
CVE-2020-12439 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2020-12439?
CVE-2020-12439 is classified under General Security Weakness.
How can I check crates.io dependencies for CVE-2020-12439?
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-6x52-88cq-55q5",
  "modified" : "2024-02-01T21:47:46Z",
  "published" : "2022-05-24T17:17:13Z",
  "aliases" : [ "CVE-2020-12439" ],
  "summary" : "Grin allows attackers to adversely affect availability of data on a Mimblewimble blockchain",
  "details" : "Grin before 3.1.0 allows attackers to adversely affect availability of data on a Mimblewimble blockchain.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "grin"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-12439"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mimblewimble/grin/issues/3235"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mimblewimble/grin/pull/3236"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-12439.md"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-02-01T21:47:46Z",
    "nvd_published_at" : "2020-05-05T22:15:00Z"
  }
}