CVE-2020-36472: Max7301 Data Races Vulnerability

MODERATE
Advisory Identifier: GHSA-rmff-f8w9-c9rm
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CVSS 5.9
CWE-362
Published
Advisory Summary

CVE-2020-36472 is a MODERATE (CVSS 5.9) data races vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Max7301 libraries in the crates.io ecosystem. The issue involves data races in max7301. Remediation is available by upgrading affected packages to version 0.2.0.

CVE-2020-36472 at a Glance

CVE Identifier CVE-2020-36472
GHSA Identifier GHSA-rmff-f8w9-c9rm
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Product Max7301
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 5.9

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

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
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-2020-36472

To remediate this vulnerability, upgrade all affected Max7301 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

max7301 fixed: 0.2.0 
Upgrade max7301 to 0.2.0
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 max7301

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36472, inspect your project dependencies for Max7301:

inspect dependencies for max7301

Analyze the terminal output to locate any version of Max7301 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.0), 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-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'), where the product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. In Max7301, 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

The `ImmediateIO` and `TransactionalIO` types implement `Sync` for all contained `Expander<EI>` types regardless of if the `Expander` itself is safe to use across threads. As the `IO` types allow retrieving the `Expander`, this can lead to non-thread safe types being sent across threads as part of the `Expander` leading to data races.

CVE-2020-36472 Affected Max7301 Versions

1 component(s)
Fixed Versions:
0.2.0
Product / Package Ecosystem Affected Versions Fixed Version
max7301
 crates.io
< 0.2.0
0.2.0

References

NVD — CVE-2020-36472 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36472
Max7301 Source Repository REPOSITORY
https://github.com/edarc/max7301/issues/1
Security Fix Commit FIX COMMIT
https://github.com/edarc/max7301/commit/0a1da873ddb29bca926bad8301f8d7ab8aa97c52
Max7301 Source Repository REPOSITORY
https://github.com/edarc/max7301
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0152.html

Frequently Asked Questions

What is CVE-2020-36472?
CVE-2020-36472 is a security vulnerability in Max7301 involving Data races in max7301 under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Max7301 versions are affected?
Affected versions include releases prior to 0.2.0 across affected packages: max7301.
What version fixes CVE-2020-36472?
Upgrading to 0.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is max7301 affected?
Yes, max7301 is affected in releases prior to 0.2.0. Upgrade your dependency to 0.2.0 or later.
What is the CVSS score of CVE-2020-36472?
CVE-2020-36472 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2020-36472?
CVE-2020-36472 is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.).
How can I check crates.io dependencies for CVE-2020-36472?
Run the dependency tree command: 'inspect dependencies for max7301'. 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-rmff-f8w9-c9rm",
  "modified" : "2021-08-18T19:14:45Z",
  "published" : "2021-08-25T20:59:22Z",
  "aliases" : [ "CVE-2020-36472" ],
  "summary" : "Data races in max7301",
  "details" : "The `ImmediateIO` and `TransactionalIO` types implement `Sync` for all contained\n`Expander<EI>` types regardless of if the `Expander` itself is safe to use\nacross threads.\n\nAs the `IO` types allow retrieving the `Expander`, this can lead to non-thread\nsafe types being sent across threads as part of the `Expander` leading to data\nraces.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "max7301"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36472"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/edarc/max7301/issues/1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/edarc/max7301/commit/0a1da873ddb29bca926bad8301f8d7ab8aa97c52"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/edarc/max7301"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0152.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-362" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-09T17:25:44Z",
    "nvd_published_at" : "2021-08-08T06:15:00Z"
  }
}