CVE-2020-36204: Im Data Races Vulnerability

MODERATE
Advisory Identifier: GHSA-q9h2-4xhf-23xx
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CVSS 4.7
CWE-662
Published
Advisory Summary

CVE-2020-36204 is a MODERATE (CVSS 4.7) data races vulnerability (CWE-662: Improper Synchronization) affecting Im libraries in the crates.io ecosystem. The issue involves data races in im. Remediation is available by upgrading affected packages to version 15.1.0.

CVE-2020-36204 at a Glance

CVE Identifier CVE-2020-36204
GHSA Identifier GHSA-q9h2-4xhf-23xx
Severity MODERATE
CVSS v3.1 Base Score 4.7
CWE Classification CWE-662: Improper Synchronization
Affected Product Im
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 4.7

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

Attack Vector Local (AV:L)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
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-2020-36204

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

im fixed: 15.1.0 
Upgrade im to 15.1.0
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 im

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36204, inspect your project dependencies for Im:

inspect dependencies for im

Analyze the terminal output to locate any version of Im in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 15.1.0), 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 CWE-662: Improper Synchronization, where the product utilizes multiple threads, processes, components, or systems to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes. In Im, 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

An issue was discovered in the im crate prior to 15.1.0 for Rust. Because TreeFocus does not have bounds on its Send trait or Sync trait, a data race can occur.

CVE-2020-36204 Affected Im Versions

1 component(s)
Fixed Versions:
15.1.0
Product / Package Ecosystem Affected Versions Fixed Version
im
 crates.io
≥ 12.0.0
< 15.1.0
15.1.0

References

NVD — CVE-2020-36204 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36204
Im Source Repository REPOSITORY
https://github.com/bodil/im-rs/issues/157
Im Source Repository REPOSITORY
https://github.com/bodil/im-rs/pull/158
Security Fix Commit FIX COMMIT
https://github.com/bodil/im-rs/commit/0b3a7b228b0fe70446393f55c8b893f349f3f6bd
Im Source Repository REPOSITORY
https://github.com/bodil/im-rs
Im Release RELEASE
https://github.com/bodil/im-rs/releases/tag/v15.1.0
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0096.html

Frequently Asked Questions

What is CVE-2020-36204?
CVE-2020-36204 is a security vulnerability in Im involving Data races in im under CWE-662: Improper Synchronization.
Which Im versions are affected?
Affected versions include releases prior to 15.1.0 across affected packages: im.
What version fixes CVE-2020-36204?
Upgrading to 15.1.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is im affected?
Yes, im is affected in releases prior to 15.1.0. Upgrade your dependency to 15.1.0 or later.
What is the CVSS score of CVE-2020-36204?
CVE-2020-36204 has a CVSS v3.1 base score of 4.7 (MODERATE) with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2020-36204?
CVE-2020-36204 is classified under CWE-662: Improper Synchronization (The product utilizes multiple threads, processes, components, or systems to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes.).
How can I check crates.io dependencies for CVE-2020-36204?
Run the dependency tree command: 'inspect dependencies for im'. 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-q9h2-4xhf-23xx",
  "modified" : "2022-06-07T21:31:41Z",
  "published" : "2021-08-25T20:51:36Z",
  "aliases" : [ "CVE-2020-36204" ],
  "summary" : "Data races in im",
  "details" : "An issue was discovered in the im crate prior to 15.1.0 for Rust. Because TreeFocus does not have bounds on its Send trait or Sync trait, a data race can occur.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "im"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "12.0.0"
      }, {
        "fixed" : "15.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36204"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/bodil/im-rs/issues/157"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/bodil/im-rs/pull/158"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/bodil/im-rs/commit/0b3a7b228b0fe70446393f55c8b893f349f3f6bd"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/bodil/im-rs"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/bodil/im-rs/releases/tag/v15.1.0"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0096.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-662" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T18:49:57Z",
    "nvd_published_at" : "2021-01-26T18:15:00Z"
  }
}