CVE-2020-36465: Generic array Use After Free Vulnerability

HIGH
Advisory Identifier: GHSA-3358-4f7f-p4j4
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CVSS 7.5
CWE-416
Published
Advisory Summary

CVE-2020-36465 is a HIGH (CVSS 7.5) use after free vulnerability (CWE-416: Use After Free) affecting Generic array libraries in the crates.io ecosystem. The issue involves use after free in generic-array. Remediation is available by upgrading affected packages to version 0.13.3, 0.12.4, 0.11.2, 0.10.1, 0.9.1.

CVE-2020-36465 at a Glance

CVE Identifier CVE-2020-36465
GHSA Identifier GHSA-3358-4f7f-p4j4
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-416: Use After Free
Affected Product Generic array
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 7.5

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
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-2020-36465

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

generic-array fixed: 0.13.3 
Upgrade generic-array to 0.13.3
generic-array fixed: 0.12.4 
Upgrade generic-array to 0.12.4
generic-array fixed: 0.11.2 
Upgrade generic-array to 0.11.2
generic-array fixed: 0.10.1 
Upgrade generic-array to 0.10.1
generic-array fixed: 0.9.1 
Upgrade generic-array to 0.9.1
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 generic-array

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36465, inspect your project dependencies for Generic array:

inspect dependencies for generic-array

Analyze the terminal output to locate any version of Generic array in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.13.3), 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-416: Use After Free, where the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. In Generic array, 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 generic-array crate before 0.13.3 for Rust. It violates soundness by using the arr! macro to extend lifetimes.

CVE-2020-36465 Affected Generic array Versions

5 component(s)
Fixed Versions:
0.13.30.12.40.11.20.10.10.9.1
Product / Package Ecosystem Affected Versions Fixed Version
generic-array
 crates.io
≥ 0.13.0
< 0.13.3
0.13.3
generic-array
 crates.io
≥ 0.12.0
< 0.12.4
0.12.4
generic-array
 crates.io
≥ 0.11.0
< 0.11.2
0.11.2
generic-array
 crates.io
≥ 0.10.0
< 0.10.1
0.10.1
generic-array
 crates.io
≥ 0.8.0
< 0.9.1
0.9.1

References

NVD — CVE-2020-36465 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36465
Generic array Source Repository REPOSITORY
https://github.com/fizyk20/generic-array/issues/98
Generic array Source Repository REPOSITORY
https://github.com/fizyk20/generic-array
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0146.html

Frequently Asked Questions

What is CVE-2020-36465?
CVE-2020-36465 is a security vulnerability in Generic array involving Use after free in generic-array under CWE-416: Use After Free.
Which Generic array versions are affected?
Affected versions include releases prior to 0.13.3, 0.12.4, 0.11.2, 0.10.1, 0.9.1 across affected packages: generic-array.
What version fixes CVE-2020-36465?
Upgrading to 0.13.3, 0.12.4, 0.11.2, 0.10.1, 0.9.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is generic-array affected?
Yes, generic-array is affected in releases prior to 0.13.3, 0.12.4, 0.11.2, 0.10.1, 0.9.1. Upgrade your dependency to 0.13.3, 0.12.4, 0.11.2, 0.10.1, 0.9.1 or later.
What is the CVSS score of CVE-2020-36465?
CVE-2020-36465 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2020-36465?
CVE-2020-36465 is classified under CWE-416: Use After Free (The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.).
How can I check crates.io dependencies for CVE-2020-36465?
Run the dependency tree command: 'inspect dependencies for generic-array'. 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-3358-4f7f-p4j4",
  "modified" : "2021-08-18T21:16:25Z",
  "published" : "2021-08-25T20:56:12Z",
  "aliases" : [ "CVE-2020-36465" ],
  "summary" : "Use after free in generic-array",
  "details" : "An issue was discovered in the generic-array crate before 0.13.3 for Rust. It violates soundness by using the arr! macro to extend lifetimes.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "generic-array"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.13.0"
      }, {
        "fixed" : "0.13.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "generic-array"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.12.0"
      }, {
        "fixed" : "0.12.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "generic-array"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.11.0"
      }, {
        "fixed" : "0.11.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "generic-array"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.10.0"
      }, {
        "fixed" : "0.10.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "generic-array"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.8.0"
      }, {
        "fixed" : "0.9.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36465"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/fizyk20/generic-array/issues/98"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/fizyk20/generic-array"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0146.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-416" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-18T21:16:25Z",
    "nvd_published_at" : "2021-08-08T06:15:00Z"
  }
}