GHSA-7mg7-m5c3-3hqj: Unicycle Data Races Vulnerability

MODERATE
Share
CWE-362
Published
Advisory Summary

GHSA-7mg7-m5c3-3hqj is a MODERATE data races vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Unicycle libraries in the crates.io ecosystem. The issue involves data races in unicycle. Remediation is available by upgrading affected packages to version 0.7.1.

GHSA-7mg7-m5c3-3hqj at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-7mg7-m5c3-3hqj
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Product Unicycle
Package Ecosystem crates.io
Published Date
Last Updated

How to Fix GHSA-7mg7-m5c3-3hqj

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

unicycle fixed: 0.7.1 
Upgrade unicycle to 0.7.1
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 unicycle

How to Check if You Are Affected

To determine whether your application is affected by GHSA-7mg7-m5c3-3hqj, inspect your project dependencies for Unicycle:

inspect dependencies for unicycle

Analyze the terminal output to locate any version of Unicycle in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.7.1), 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 Unicycle, 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 implemented `Send` & `Sync` for types `PinSlab<T>` & `Unordered<T, S>`. This allows sending non-Send types to other threads and concurrently accessing non-Sync types from multiple threads. This can result in a data race & memory corruption when types that provide internal mutability without synchronization are contained within `PinSlab<T>` or `Unordered<T, S>` and accessed concurrently from multiple threads. The flaw was corrected in commits 92f40b4 & 6a6c367 by adding trait bound `T: Send` to `Send` impls for `PinSlab<T>` & `Unordered<T, S>` and adding `T: Sync` to `Sync` impls for `PinSlab<T>` & `Unordered<T, S>`.

GHSA-7mg7-m5c3-3hqj Affected Unicycle Versions

1 component(s)
Fixed Versions:
0.7.1
Product / Package Ecosystem Affected Versions Fixed Version
unicycle
 crates.io
< 0.7.1
0.7.1

References

Unicycle Source Repository REPOSITORY
https://github.com/udoprog/unicycle/issues/8
Security Fix Commit FIX COMMIT
https://github.com/udoprog/unicycle/commit/6a6c367a0c25f86f998fa315ea90c328f685b194
Security Fix Commit FIX COMMIT
https://github.com/udoprog/unicycle/commit/92f40b4a2c671553dfa96feacff0265206c44ce5
Unicycle Source Repository REPOSITORY
https://github.com/udoprog/unicycle
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0116.html

Frequently Asked Questions

What is GHSA-7mg7-m5c3-3hqj?
GHSA-7mg7-m5c3-3hqj is a security vulnerability in Unicycle involving Data races in unicycle under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Unicycle versions are affected?
Affected versions include releases prior to 0.7.1 across affected packages: unicycle.
What version fixes GHSA-7mg7-m5c3-3hqj?
Upgrading to 0.7.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is unicycle affected?
Yes, unicycle is affected in releases prior to 0.7.1. Upgrade your dependency to 0.7.1 or later.
What CWE is associated with GHSA-7mg7-m5c3-3hqj?
GHSA-7mg7-m5c3-3hqj 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 GHSA-7mg7-m5c3-3hqj?
Run the dependency tree command: 'inspect dependencies for unicycle'. 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-7mg7-m5c3-3hqj",
  "modified" : "2021-08-24T17:47:15Z",
  "published" : "2021-08-25T21:00:39Z",
  "withdrawn" : "2021-08-24T17:47:15Z",
  "aliases" : [ ],
  "summary" : "Data races in unicycle",
  "details" : "Affected versions of this crate unconditionally implemented `Send` & `Sync` for types `PinSlab<T>` & `Unordered<T, S>`. This allows sending non-Send types to other threads and concurrently accessing non-Sync types from multiple threads.\n\nThis can result in a data race & memory corruption when types that provide internal mutability without synchronization are contained within `PinSlab<T>` or `Unordered<T, S>` and accessed concurrently from multiple threads.\n\nThe flaw was corrected in commits 92f40b4 & 6a6c367 by adding trait bound `T: Send` to `Send` impls for `PinSlab<T>` & `Unordered<T, S>` and adding `T: Sync` to `Sync` impls for `PinSlab<T>` & `Unordered<T, S>`.\n",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "unicycle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.7.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/udoprog/unicycle/issues/8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/udoprog/unicycle/commit/6a6c367a0c25f86f998fa315ea90c328f685b194"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/udoprog/unicycle/commit/92f40b4a2c671553dfa96feacff0265206c44ce5"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/udoprog/unicycle"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0116.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-362" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-05T21:14:52Z",
    "nvd_published_at" : null
  }
}