CVE-2021-45705: Nanorand Pointer Dereference Vulnerability

CRITICAL
Advisory Identifier: GHSA-r57r-j98g-587f
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CVSS 9.8
Published
Advisory Summary

CVE-2021-45705 is a CRITICAL (CVSS 9.8) pointer dereference vulnerability (General Security Weakness) affecting Nanorand libraries in the crates.io ecosystem. The issue involves pointer dereference in nanorand. Remediation is available by upgrading affected packages to version 0.6.1.

CVE-2021-45705 at a Glance

CVE Identifier CVE-2021-45705
GHSA Identifier GHSA-r57r-j98g-587f
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification General Security Weakness
Affected Product Nanorand
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2021-45705

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

nanorand fixed: 0.6.1 
Upgrade nanorand to 0.6.1
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 nanorand

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-45705, inspect your project dependencies for Nanorand:

inspect dependencies for nanorand

Analyze the terminal output to locate any version of Nanorand in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.6.1), 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 General Security Weakness. In Nanorand, 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 nanorand crate before 0.6.1 for Rust. There can be multiple mutable references to the same object because the TlsWyRand Deref implementation dereferences a raw pointer.

CVE-2021-45705 Affected Nanorand Versions

1 component(s)
Fixed Versions:
0.6.1
Product / Package Ecosystem Affected Versions Fixed Version
nanorand
 crates.io
≥ 0.5.0
< 0.6.1
0.6.1

References

NVD — CVE-2021-45705 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-45705
Nanorand Source Repository REPOSITORY
https://github.com/Absolucy/nanorand-rs/issues/28
Nanorand Source Repository REPOSITORY
https://github.com/Absolucy/nanorand-rs
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/nanorand/RUSTSEC-2021-0114.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2021-0114.html

Frequently Asked Questions

What is CVE-2021-45705?
CVE-2021-45705 is a security vulnerability in Nanorand involving Pointer dereference in nanorand under General Security Weakness.
Which Nanorand versions are affected?
Affected versions include releases prior to 0.6.1 across affected packages: nanorand.
What version fixes CVE-2021-45705?
Upgrading to 0.6.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is nanorand affected?
Yes, nanorand is affected in releases prior to 0.6.1. Upgrade your dependency to 0.6.1 or later.
What is the CVSS score of CVE-2021-45705?
CVE-2021-45705 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-45705?
CVE-2021-45705 is classified under General Security Weakness.
How can I check crates.io dependencies for CVE-2021-45705?
Run the dependency tree command: 'inspect dependencies for nanorand'. 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-r57r-j98g-587f",
  "modified" : "2022-01-07T18:29:44Z",
  "published" : "2022-01-06T22:08:56Z",
  "aliases" : [ "CVE-2021-45705" ],
  "summary" : "Pointer dereference in nanorand",
  "details" : "An issue was discovered in the nanorand crate before 0.6.1 for Rust. There can be multiple mutable references to the same object because the TlsWyRand Deref implementation dereferences a raw pointer.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "nanorand"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.5.0"
      }, {
        "fixed" : "0.6.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-45705"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Absolucy/nanorand-rs/issues/28"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Absolucy/nanorand-rs"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/nanorand/RUSTSEC-2021-0114.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2021-0114.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-05T23:20:00Z",
    "nvd_published_at" : "2021-12-27T00:15:00Z"
  }
}