CVE-2020-36468: Cgc Non-atomic Writes Vulnerability

MODERATE
Advisory Identifier: GHSA-pwhf-7427-9vv2
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CVSS 5.9
CWE-657
Published
Advisory Summary

CVE-2020-36468 is a MODERATE (CVSS 5.9) non-atomic writes vulnerability (CWE-657: Violation of Secure Design Principles) affecting Cgc libraries in the crates.io ecosystem. The issue involves non-atomic writes in cgc. Remediation is available in the latest vendor maintenance releases.

CVE-2020-36468 at a Glance

CVE Identifier CVE-2020-36468
GHSA Identifier GHSA-pwhf-7427-9vv2
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-657: Violation of Secure Design Principles
Affected Product Cgc
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-2020-36468

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

cgc fixed: Latest secure release 
Upgrade cgc 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 cgc

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36468, inspect your project dependencies for Cgc:

inspect dependencies for cgc

Analyze the terminal output to locate any version of Cgc 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-657: Violation of Secure Design Principles, where the product violates well-established principles for secure design. In Cgc, 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

# Multiple soundness issues in `Ptr` in cgc Affected versions of this crate have the following issues: 1. `Ptr` implements `Send` and `Sync` for all types, this can lead to data races by sending non-thread safe types across threads. 2. `Ptr::get` violates mutable alias rules by returning multiple mutable references to the same object. 3. `Ptr::write` uses non-atomic writes to the underlying pointer. This means that when used across threads it can lead to data races.

CVE-2020-36468 Affected Cgc Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
cgc
 crates.io
≤ 0.4.0

References

NVD — CVE-2020-36468 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36468
Cgc Source Repository REPOSITORY
https://github.com/playXE/cgc/issues/5
Cgc Source Repository REPOSITORY
https://github.com/playXE/cgc
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/cgc/RUSTSEC-2020-0148.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0148.html

Frequently Asked Questions

What is CVE-2020-36468?
CVE-2020-36468 is a security vulnerability in Cgc involving Non-atomic writes in cgc under CWE-657: Violation of Secure Design Principles.
Which Cgc versions are affected?
Affected versions include releases prior to current release patches across affected packages: cgc.
What version fixes CVE-2020-36468?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is cgc affected?
Yes, cgc 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-2020-36468?
CVE-2020-36468 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-2020-36468?
CVE-2020-36468 is classified under CWE-657: Violation of Secure Design Principles (The product violates well-established principles for secure design.).
How can I check crates.io dependencies for CVE-2020-36468?
Run the dependency tree command: 'inspect dependencies for cgc'. 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-pwhf-7427-9vv2",
  "modified" : "2023-06-13T16:46:48Z",
  "published" : "2021-08-25T20:56:57Z",
  "aliases" : [ "CVE-2020-36468" ],
  "summary" : "Non-atomic writes in cgc",
  "details" : "# Multiple soundness issues in `Ptr` in cgc\n\nAffected versions of this crate have the following issues:\n\n1. `Ptr` implements `Send` and `Sync` for all types, this can lead to data\n   races by sending non-thread safe types across threads.\n\n2. `Ptr::get` violates mutable alias rules by returning multiple mutable\n   references to the same object.\n\n3. `Ptr::write` uses non-atomic writes to the underlying pointer. This means\n   that when used across threads it can lead to data races.",
  "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" : "cgc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.4.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36468"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/playXE/cgc/issues/5"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/playXE/cgc"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/cgc/RUSTSEC-2020-0148.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0148.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-657" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-18T20:39:03Z",
    "nvd_published_at" : "2021-08-08T06:15:00Z"
  }
}