CVE-2021-45680: Vec const Out-of-bounds Write Vulnerability

HIGH
Advisory Identifier: GHSA-x76r-966h-5qv9
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CVSS 7.5
CWE-787
Published
Advisory Summary

CVE-2021-45680 is a HIGH (CVSS 7.5) out-of-bounds write vulnerability (CWE-787: Out-of-bounds Write) affecting Vec const libraries in the crates.io ecosystem. The issue involves out-of-bounds write in vec-const. Remediation is available by upgrading affected packages to version 2.0.0.

CVE-2021-45680 at a Glance

CVE Identifier CVE-2021-45680
GHSA Identifier GHSA-x76r-966h-5qv9
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-787: Out-of-bounds Write
Affected Product Vec const
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-2021-45680

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

vec-const fixed: 2.0.0 
Upgrade vec-const to 2.0.0
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 vec-const

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-45680, inspect your project dependencies for Vec const:

inspect dependencies for vec-const

Analyze the terminal output to locate any version of Vec const in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.0), 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 Vec const, 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 vec-const crate before 2.0.0 for Rust. It tries to construct a Vec from a pointer to a const slice, leading to memory corruption.

CVE-2021-45680 Affected Vec const Versions

1 component(s)
Fixed Versions:
2.0.0
Product / Package Ecosystem Affected Versions Fixed Version
vec-const
 crates.io
< 2.0.0
2.0.0

References

NVD — CVE-2021-45680 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-45680
Vec const Source Repository REPOSITORY
https://github.com/Eolu/vec-const/issues/1#issuecomment-898908241
Vec const Source Repository REPOSITORY
https://github.com/Eolu/vec-const
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/vec-const/RUSTSEC-2021-0082.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2021-0082.html

Frequently Asked Questions

What is CVE-2021-45680?
CVE-2021-45680 is a security vulnerability in Vec const involving Out-of-bounds Write in vec-const under CWE-787: Out-of-bounds Write.
Which Vec const versions are affected?
Affected versions include releases prior to 2.0.0 across affected packages: vec-const.
What version fixes CVE-2021-45680?
Upgrading to 2.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is vec-const affected?
Yes, vec-const is affected in releases prior to 2.0.0. Upgrade your dependency to 2.0.0 or later.
What is the CVSS score of CVE-2021-45680?
CVE-2021-45680 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-2021-45680?
CVE-2021-45680 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-2021-45680?
Run the dependency tree command: 'inspect dependencies for vec-const'. 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-x76r-966h-5qv9",
  "modified" : "2022-01-07T16:19:25Z",
  "published" : "2022-01-06T22:15:56Z",
  "aliases" : [ "CVE-2021-45680" ],
  "summary" : "Out-of-bounds Write in vec-const",
  "details" : "An issue was discovered in the vec-const crate before 2.0.0 for Rust. It tries to construct a Vec from a pointer to a const slice, leading to memory corruption.",
  "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" : "vec-const"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-45680"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Eolu/vec-const/issues/1#issuecomment-898908241"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Eolu/vec-const"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/vec-const/RUSTSEC-2021-0082.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2021-0082.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-787" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-06T18:17:26Z",
    "nvd_published_at" : "2021-12-27T00:15:00Z"
  }
}