CVE-2021-29931: Arenavec Double Free Vulnerability

HIGH
Advisory Identifier: GHSA-955p-rc5h-hg6h
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CVSS 7.5
CWE-415
Published
Advisory Summary

CVE-2021-29931 is a HIGH (CVSS 7.5) double free vulnerability (CWE-415: Double Free) affecting Arenavec libraries in the crates.io ecosystem. The issue involves double free in arenavec. Remediation is available in the latest vendor maintenance releases.

CVE-2021-29931 at a Glance

CVE Identifier CVE-2021-29931
GHSA Identifier GHSA-955p-rc5h-hg6h
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-415: Double Free
Affected Product Arenavec
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-2021-29931

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

arenavec fixed: Latest secure release 
Upgrade arenavec 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 arenavec

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-29931, inspect your project dependencies for Arenavec:

inspect dependencies for arenavec

Analyze the terminal output to locate any version of Arenavec 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-415: Double Free, where the product calls free() twice on the same memory address. In Arenavec, 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 did not guard against potential panics that may happen from user-provided functions T::default() and T::drop(). Panic within T::default() leads to dropping uninitialized T, when it is invoked from common::Slice::<T, H>::new(). Panic within T::drop() leads to double drop of T, when it is invoked either from common::SliceVec::<T, H>::resize_with() or common::SliceVec::<T, H>::resize() Either case causes memory corruption in the heap memory.

CVE-2021-29931 Affected Arenavec Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
arenavec
 crates.io
≤ 0.1.1

References

NVD — CVE-2021-29931 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-29931
Arenavec Source Repository REPOSITORY
https://github.com/ibabushkin/arenavec/issues/1
Arenavec Source Repository REPOSITORY
https://github.com/ibabushkin/arenavec
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2021-0040.html

Frequently Asked Questions

What is CVE-2021-29931?
CVE-2021-29931 is a security vulnerability in Arenavec involving Double free in arenavec under CWE-415: Double Free.
Which Arenavec versions are affected?
Affected versions include releases prior to current release patches across affected packages: arenavec.
What version fixes CVE-2021-29931?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is arenavec affected?
Yes, arenavec 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-2021-29931?
CVE-2021-29931 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-2021-29931?
CVE-2021-29931 is classified under CWE-415: Double Free (The product calls free() twice on the same memory address.).
How can I check crates.io dependencies for CVE-2021-29931?
Run the dependency tree command: 'inspect dependencies for arenavec'. 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-955p-rc5h-hg6h",
  "modified" : "2023-06-13T16:52:27Z",
  "published" : "2021-08-25T20:55:04Z",
  "aliases" : [ "CVE-2021-29931" ],
  "summary" : "Double free in arenavec",
  "details" : "Affected versions of this crate did not guard against potential panics that may happen from user-provided functions T::default() and T::drop().\n\nPanic within T::default() leads to dropping uninitialized T, when it is invoked from common::Slice::<T, H>::new(). Panic within T::drop() leads to double drop of T, when it is invoked either from common::SliceVec::<T, H>::resize_with() or common::SliceVec::<T, H>::resize()\n\nEither case causes memory corruption in the heap memory.",
  "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" : "arenavec"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-29931"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ibabushkin/arenavec/issues/1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ibabushkin/arenavec"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2021-0040.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-415" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T17:08:56Z",
    "nvd_published_at" : null
  }
}