Vulnerabilities in pkg:pypi/diplib

PACKAGE
Advisory Identifier: GHSA-xf2w-5673-h6ww
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Advisory Summary

CVE-2021-39432 is a MODERATE (CVSS 6.5) diplib double free vulnerability (CWE-415: Double Free) affecting Diplib libraries in the PyPI ecosystem. The issue involves diplib double free. Remediation is available by upgrading affected packages to version 3.1.0.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:pypi/diplib

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:pypi/diplib. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-xf2w-5673-h6ww CVE-2021-39432 MODERATE diplib Double Free

CVE-2021-39432 at a Glance

CVE Identifier CVE-2021-39432
GHSA Identifier GHSA-xf2w-5673-h6ww
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-415: Double Free
Affected Product Diplib
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 6.5

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:R/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 Required (UI:R)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2021-39432

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

diplib fixed: 3.1.0 
pip install diplib>=3.1.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show diplib

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2021-39432, inspect your installed packages using pip:

pip show diplib

Analyze the terminal output to locate any version of Diplib in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.1.0), your application is affected.

Note: The pip show diplib command checks currently installed packages in your active Python environment.

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 Diplib, 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

diplib v3.0.0 is vulnerable to Double Free.

CVE-2021-39432 Affected Diplib Versions

1 component(s)
Fixed Versions:
3.1.0
Product / Package Ecosystem Affected Versions Fixed Version
diplib
pypi/diplib
PyPI
< 3.1.0
3.1.0

References

NVD — CVE-2021-39432 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-39432
Diplib Source Repository REPOSITORY
https://github.com/DIPlib/diplib/issues/80
Security Fix Commit FIX COMMIT
https://github.com/DIPlib/diplib/commit/8b9a2670ce66ff2fd5addf592f7825e1f5adb5b5
Diplib Source Repository REPOSITORY
https://github.com/DIPlib/diplib
Diplib Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/diplib/PYSEC-2022-43131.yaml

Frequently Asked Questions

What is CVE-2021-39432?
CVE-2021-39432 is a security vulnerability in Diplib involving diplib Double Free under CWE-415: Double Free.
Which Diplib versions are affected?
Affected versions include releases prior to 3.1.0 across affected packages: diplib.
What version fixes CVE-2021-39432?
Upgrading to 3.1.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is diplib affected?
Yes, diplib is affected in releases prior to 3.1.0. Upgrade your dependency to 3.1.0 or later.
What is the CVSS score of CVE-2021-39432?
CVE-2021-39432 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2021-39432?
CVE-2021-39432 is classified under CWE-415: Double Free (The product calls free() twice on the same memory address.).
How can I check PyPI dependencies for CVE-2021-39432?
Run the dependency tree command: 'pip show diplib'. 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-xf2w-5673-h6ww",
  "modified" : "2026-06-10T18:44:04Z",
  "published" : "2022-11-04T19:01:09Z",
  "aliases" : [ "CVE-2021-39432" ],
  "summary" : "diplib Double Free",
  "details" : "diplib v3.0.0 is vulnerable to Double Free.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "diplib"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-39432"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/DIPlib/diplib/issues/80"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/DIPlib/diplib/commit/8b9a2670ce66ff2fd5addf592f7825e1f5adb5b5"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/DIPlib/diplib"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/diplib/PYSEC-2022-43131.yaml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-415", "CWE-416" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-11-21T22:14:21Z",
    "nvd_published_at" : "2022-11-04T17:15:00Z"
  }
}