CVE-2020-36447: V9 Data Race Vulnerability

HIGH
Advisory Identifier: GHSA-3837-87vh-xq3w
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CVSS 8.1
CWE-77
Published
Advisory Summary

CVE-2020-36447 is a HIGH (CVSS 8.1) data race vulnerability (CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')) affecting V9 libraries in the crates.io ecosystem. The issue involves data race in v9. Remediation is available by upgrading affected packages to version 0.1.43.

CVE-2020-36447 at a Glance

CVE Identifier CVE-2020-36447
GHSA Identifier GHSA-3837-87vh-xq3w
Severity HIGH
CVSS v3.1 Base Score 8.1
CWE Classification CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
Affected Product V9
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 8.1

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:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2020-36447

To remediate this vulnerability, upgrade all affected V9 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

v9 fixed: 0.1.43 
Upgrade v9 to 0.1.43
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 v9

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36447, inspect your project dependencies for V9:

inspect dependencies for v9

Analyze the terminal output to locate any version of V9 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.1.43), 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-77: Improper Neutralization of Special Elements used in a Command ('Command Injection'), where the product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. In V9, 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

Affected versions of this crate unconditionally implement Sync for SyncRef<T>. This definition allows data races if &T is accessible through &SyncRef. SyncRef<T> derives Clone and Debug, and the default implementations of those traits access &T by invoking T::clone() & T::fmt(). It is possible to create data races & undefined behavior by concurrently invoking SyncRef<T>::clone() or SyncRef<T>::fmt() from multiple threads with T: !Sync.

CVE-2020-36447 Affected V9 Versions

1 component(s)
Fixed Versions:
0.1.43
Product / Package Ecosystem Affected Versions Fixed Version
v9
 crates.io
< 0.1.43
0.1.43

References

NVD — CVE-2020-36447 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36447
V9 Source Repository REPOSITORY
https://github.com/purpleposeidon/v9/issues/1
Security Fix Commit FIX COMMIT
https://github.com/purpleposeidon/v9/commit/18847c50e5d36561cc91c996c3539ddb1eacf6c7
V9 Source Repository REPOSITORY
https://github.com/purpleposeidon/v9
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/v9/RUSTSEC-2020-0127.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0127.html

Frequently Asked Questions

What is CVE-2020-36447?
CVE-2020-36447 is a security vulnerability in V9 involving Data race in v9 under CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection').
Which V9 versions are affected?
Affected versions include releases prior to 0.1.43 across affected packages: v9.
What version fixes CVE-2020-36447?
Upgrading to 0.1.43 (or the latest patched release for your respective branch) resolves the vulnerability.
Is v9 affected?
Yes, v9 is affected in releases prior to 0.1.43. Upgrade your dependency to 0.1.43 or later.
What is the CVSS score of CVE-2020-36447?
CVE-2020-36447 has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2020-36447?
CVE-2020-36447 is classified under CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') (The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.).
How can I check crates.io dependencies for CVE-2020-36447?
Run the dependency tree command: 'inspect dependencies for v9'. 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-3837-87vh-xq3w",
  "modified" : "2023-06-13T22:35:33Z",
  "published" : "2021-08-25T20:57:07Z",
  "aliases" : [ "CVE-2020-36447" ],
  "summary" : "Data race in v9",
  "details" : "Affected versions of this crate unconditionally implement Sync for SyncRef<T>. This definition allows data races if &T is accessible through &SyncRef.\n\nSyncRef<T> derives Clone and Debug, and the default implementations of those traits access &T by invoking T::clone() & T::fmt(). It is possible to create data races & undefined behavior by concurrently invoking SyncRef<T>::clone() or SyncRef<T>::fmt() from multiple threads with T: !Sync.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "v9"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.1.43"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36447"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/purpleposeidon/v9/issues/1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/purpleposeidon/v9/commit/18847c50e5d36561cc91c996c3539ddb1eacf6c7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/purpleposeidon/v9"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/v9/RUSTSEC-2020-0127.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0127.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-77" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-18T20:31:57Z",
    "nvd_published_at" : "2021-08-08T06:15:00Z"
  }
}