CVE-2021-45690: Messagepack rs Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-vw5m-qw2r-m923
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CVSS 9.8
CWE-908
Published
Advisory Summary

CVE-2021-45690 is a CRITICAL (CVSS 9.8) remote code execution vulnerability (CWE-908: Use of Uninitialized Resource) affecting Messagepack rs libraries in the crates.io ecosystem. The issue involves use of uninitialized resource in messagepack-rs.. Remediation is available in the latest vendor maintenance releases.

CVE-2021-45690 at a Glance

CVE Identifier CVE-2021-45690
GHSA Identifier GHSA-vw5m-qw2r-m923
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-908: Use of Uninitialized Resource
Affected Product Messagepack rs
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-2021-45690

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

messagepack-rs fixed: Latest secure release 
Upgrade messagepack-rs 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 messagepack-rs

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-45690, inspect your project dependencies for Messagepack rs:

inspect dependencies for messagepack-rs

Analyze the terminal output to locate any version of Messagepack rs 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-908: Use of Uninitialized Resource, where the product uses or accesses a resource that has not been initialized. In Messagepack rs, 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 messagepack-rs crate through 2021-01-26 for Rust. deserialize_binary may read from uninitialized memory locations.

CVE-2021-45690 Affected Messagepack rs Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
messagepack-rs
 crates.io
≤ 0.8.1

References

NVD — CVE-2021-45690 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-45690
Messagepack rs Source Repository REPOSITORY
https://github.com/otake84/messagepack-rs/issues/2
Messagepack rs Source Repository REPOSITORY
https://github.com/otake84/messagepack-rs
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/messagepack-rs/RUSTSEC-2021-0092.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2021-0092.html

Frequently Asked Questions

What is CVE-2021-45690?
CVE-2021-45690 is a security vulnerability in Messagepack rs involving Use of Uninitialized Resource in messagepack-rs. under CWE-908: Use of Uninitialized Resource.
Which Messagepack rs versions are affected?
Affected versions include releases prior to current release patches across affected packages: messagepack-rs.
What version fixes CVE-2021-45690?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is messagepack-rs affected?
Yes, messagepack-rs 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-2021-45690?
CVE-2021-45690 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-2021-45690?
CVE-2021-45690 is classified under CWE-908: Use of Uninitialized Resource (The product uses or accesses a resource that has not been initialized.).
How can I check crates.io dependencies for CVE-2021-45690?
Run the dependency tree command: 'inspect dependencies for messagepack-rs'. 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-vw5m-qw2r-m923",
  "modified" : "2022-01-07T17:13:28Z",
  "published" : "2022-01-06T22:11:46Z",
  "aliases" : [ "CVE-2021-45690" ],
  "summary" : "Use of Uninitialized Resource in messagepack-rs.",
  "details" : "An issue was discovered in the messagepack-rs crate through 2021-01-26 for Rust. deserialize_binary may read from uninitialized memory locations.",
  "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" : "messagepack-rs"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.8.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-45690"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/otake84/messagepack-rs/issues/2"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/otake84/messagepack-rs"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/messagepack-rs/RUSTSEC-2021-0092.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2021-0092.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-908" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-06T16:39:25Z",
    "nvd_published_at" : "2021-12-27T00:15:00Z"
  }
}