CVE-2021-45681: Derive com impl Out-of-bounds Write Vulnerability

HIGH
Advisory Identifier: GHSA-w4cc-pc2h-whcj
Share
CVSS 7.5
CWE-787
Published
Advisory Summary

CVE-2021-45681 is a HIGH (CVSS 7.5) out-of-bounds write vulnerability (CWE-787: Out-of-bounds Write) affecting Derive com impl libraries in the crates.io ecosystem. The issue involves out-of-bounds write in derive-com-impl. Remediation is available in the latest vendor maintenance releases.

CVE-2021-45681 at a Glance

CVE Identifier CVE-2021-45681
GHSA Identifier GHSA-w4cc-pc2h-whcj
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-787: Out-of-bounds Write
Affected Product Derive com impl
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-2021-45681

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

derive-com-impl fixed: Latest secure release 
Upgrade derive-com-impl 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 derive-com-impl

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-45681, inspect your project dependencies for Derive com impl:

inspect dependencies for derive-com-impl

Analyze the terminal output to locate any version of Derive com impl 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-787: Out-of-bounds Write, where the product writes data past the end, or before the beginning, of the intended buffer. In Derive com impl, 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 derive-com-impl crate before 0.1.2 for Rust. An invalid reference (and memory corruption) can occur because AddRef might not be called before returning a pointer.

CVE-2021-45681 Affected Derive com impl Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
derive-com-impl
 crates.io

References

NVD — CVE-2021-45681 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-45681
Derive com impl Source Repository REPOSITORY
https://github.com/Connicpu/com-impl/issues/1
Derive com impl Source Repository REPOSITORY
https://github.com/connicpu/com-impl
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/derive-com-impl/RUSTSEC-2021-0083.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2021-0083.html

Frequently Asked Questions

What is CVE-2021-45681?
CVE-2021-45681 is a security vulnerability in Derive com impl involving Out-of-bounds Write in derive-com-impl under CWE-787: Out-of-bounds Write.
Which Derive com impl versions are affected?
Affected versions include releases prior to current release patches across affected packages: derive-com-impl.
What version fixes CVE-2021-45681?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is derive-com-impl affected?
Yes, derive-com-impl 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-2021-45681?
CVE-2021-45681 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-2021-45681?
CVE-2021-45681 is classified under CWE-787: Out-of-bounds Write (The product writes data past the end, or before the beginning, of the intended buffer.).
How can I check crates.io dependencies for CVE-2021-45681?
Run the dependency tree command: 'inspect dependencies for derive-com-impl'. 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-w4cc-pc2h-whcj",
  "modified" : "2022-01-07T16:17:28Z",
  "published" : "2022-01-06T22:16:10Z",
  "aliases" : [ "CVE-2021-45681" ],
  "summary" : "Out-of-bounds Write in derive-com-impl",
  "details" : "An issue was discovered in the derive-com-impl crate before 0.1.2 for Rust. An invalid reference (and memory corruption) can occur because AddRef might not be called before returning a pointer.",
  "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" : "derive-com-impl"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 0.1.2"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-45681"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Connicpu/com-impl/issues/1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/connicpu/com-impl"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/derive-com-impl/RUSTSEC-2021-0083.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2021-0083.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-787" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-06T17:46:38Z",
    "nvd_published_at" : "2021-12-27T00:15:00Z"
  }
}