CVE-2020-36446: Signal simple Data Races Vulnerability

HIGH
Advisory Identifier: GHSA-36cg-4jff-5863
Share
CVSS 8.1
CWE-362 CWE-119
Published
Advisory Summary

CVE-2020-36446 is a HIGH (CVSS 8.1) data races vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Signal simple libraries in the crates.io ecosystem. The issue involves data races in signal-simple. Remediation is available in the latest vendor maintenance releases.

CVE-2020-36446 at a Glance

CVE Identifier CVE-2020-36446
GHSA Identifier GHSA-36cg-4jff-5863
Severity HIGH
CVSS v3.1 Base Score 8.1
CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Product Signal simple
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-2020-36446

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

signal-simple fixed: Latest secure release 
Upgrade signal-simple to Latest secure release
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 signal-simple

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36446, inspect your project dependencies for Signal simple:

inspect dependencies for signal-simple

Analyze the terminal output to locate any version of Signal simple in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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 Signal simple, 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 Send/Sync for SyncChannel<T>. SyncChannel<T> doesn't provide access to &T but merely serves as a channel that consumes and returns owned T. Users can create UB in safe Rust by sending T: !Send to other threads with SyncChannel::send/recv APIs. Using T = Arc<Cell<_> allows to create data races (which can lead to memory corruption), and using T = MutexGuard<T> allows to unlock a mutex from a thread that didn't lock the mutex.

CVE-2020-36446 Affected Signal simple Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
signal-simple
 crates.io
≤ 0.1.1

References

NVD — CVE-2020-36446 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36446
Signal simple Source Repository REPOSITORY
https://github.com/kitsuneninetails/signal-rust/issues/2
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/signal-simple/RUSTSEC-2020-0126.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0126.html
Signal simple Source Repository REPOSITORY
http://github.com/kitsuneninetails/signal-rust

Frequently Asked Questions

What is CVE-2020-36446?
CVE-2020-36446 is a security vulnerability in Signal simple involving Data races in signal-simple under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Signal simple versions are affected?
Affected versions include releases prior to current release patches across affected packages: signal-simple.
What version fixes CVE-2020-36446?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is signal-simple affected?
Yes, signal-simple is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2020-36446?
CVE-2020-36446 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-2020-36446?
CVE-2020-36446 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-2020-36446?
Run the dependency tree command: 'inspect dependencies for signal-simple'. 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-36cg-4jff-5863",
  "modified" : "2023-06-13T20:41:14Z",
  "published" : "2021-08-25T20:59:13Z",
  "aliases" : [ "CVE-2020-36446" ],
  "summary" : "Data races in signal-simple",
  "details" : "Affected versions of this crate unconditionally implement Send/Sync for SyncChannel<T>. SyncChannel<T> doesn't provide access to &T but merely serves as a channel that consumes and returns owned T.\n\nUsers can create UB in safe Rust by sending T: !Send to other threads with SyncChannel::send/recv APIs. Using T = Arc<Cell<_> allows to create data races (which can lead to memory corruption), and using T = MutexGuard<T> allows to unlock a mutex from a thread that didn't lock the mutex.",
  "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" : "signal-simple"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36446"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kitsuneninetails/signal-rust/issues/2"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/signal-simple/RUSTSEC-2020-0126.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0126.html"
  }, {
    "type" : "PACKAGE",
    "url" : "http://github.com/kitsuneninetails/signal-rust"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-119", "CWE-362" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-09T21:44:31Z",
    "nvd_published_at" : "2021-08-08T06:15:00Z"
  }
}