CVE-2021-26952: Ms3d Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-9f5r-vqm5-m342
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CVSS 7.5
CWE-908
Published
Advisory Summary

CVE-2021-26952 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-908: Use of Uninitialized Resource) affecting Ms3d libraries in the crates.io ecosystem. The issue involves use of uninitialized resource in ms3d. Remediation is available by upgrading affected packages to version 0.1.3.

CVE-2021-26952 at a Glance

CVE Identifier CVE-2021-26952
GHSA Identifier GHSA-9f5r-vqm5-m342
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-908: Use of Uninitialized Resource
Affected Product Ms3d
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:H/I:N/A:N).

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 None (I:N)
Availability None (A:N)

How to Fix CVE-2021-26952

To remediate this vulnerability, upgrade all affected Ms3d dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

ms3d fixed: 0.1.3 
Upgrade ms3d to 0.1.3
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 ms3d

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-26952, inspect your project dependencies for Ms3d:

inspect dependencies for ms3d

Analyze the terminal output to locate any version of Ms3d in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.1.3), 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-908: Use of Uninitialized Resource, where the product uses or accesses a resource that has not been initialized. In Ms3d, 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 passes an uninitialized buffer to a user-provided Read implementation. Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior. The flaw was fixed in commit `599313b` by zero-initializing the buffer (via self.buf.resize(len, 0)) before passing it to Read.

CVE-2021-26952 Affected Ms3d Versions

1 component(s)
Fixed Versions:
0.1.3
Product / Package Ecosystem Affected Versions Fixed Version
ms3d
 crates.io
< 0.1.3
0.1.3

References

NVD — CVE-2021-26952 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26952
Ms3d Source Repository REPOSITORY
https://github.com/andrewhickman/ms3d/issues/1
Security Fix Commit FIX COMMIT
https://github.com/andrewhickman/ms3d/commit/599313b
Ms3d Source Repository REPOSITORY
https://github.com/andrewhickman/ms3d
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2021-0016.html

Frequently Asked Questions

What is CVE-2021-26952?
CVE-2021-26952 is a security vulnerability in Ms3d involving Use of Uninitialized Resource in ms3d under CWE-908: Use of Uninitialized Resource.
Which Ms3d versions are affected?
Affected versions include releases prior to 0.1.3 across affected packages: ms3d.
What version fixes CVE-2021-26952?
Upgrading to 0.1.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ms3d affected?
Yes, ms3d is affected in releases prior to 0.1.3. Upgrade your dependency to 0.1.3 or later.
What is the CVSS score of CVE-2021-26952?
CVE-2021-26952 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:H/I:N/A:N.
What CWE is associated with CVE-2021-26952?
CVE-2021-26952 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-2021-26952?
Run the dependency tree command: 'inspect dependencies for ms3d'. 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-9f5r-vqm5-m342",
  "modified" : "2023-06-13T20:06:12Z",
  "published" : "2021-08-25T20:53:16Z",
  "aliases" : [ "CVE-2021-26952" ],
  "summary" : "Use of Uninitialized Resource in ms3d",
  "details" : "Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation. Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.\n\nThe flaw was fixed in commit `599313b` by zero-initializing the buffer (via self.buf.resize(len, 0)) before passing it to Read.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "ms3d"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.1.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-26952"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/andrewhickman/ms3d/issues/1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/andrewhickman/ms3d/commit/599313b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/andrewhickman/ms3d"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2021-0016.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-908" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T17:44:22Z",
    "nvd_published_at" : null
  }
}