CVE-2020-12889: MISP maltego Maltego Incorrectly Shares A MISP Vulnerability

CRITICAL
Advisory Identifier: GHSA-fj35-m94r-9h4c
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CVSS 9.8
CWE-284
Published
Advisory Summary

CVE-2020-12889 is a CRITICAL (CVSS 9.8) maltego incorrectly shares a misp vulnerability (CWE-284: Improper Access Control) affecting MISP maltego libraries in the PyPI ecosystem. The issue involves maltego incorrectly shares a misp connection across users in a remote-transform use case. Remediation is available by upgrading affected packages to version 1.4.5.

CVE-2020-12889 at a Glance

CVE Identifier CVE-2020-12889
GHSA Identifier GHSA-fj35-m94r-9h4c
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-284: Improper Access Control
Affected Product MISP maltego
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2020-12889

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

MISP-maltego fixed: 1.4.5 
pip install MISP-maltego>=1.4.5
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 MISP-maltego

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2020-12889, inspect your installed packages using pip:

pip show MISP-maltego

Analyze the terminal output to locate any version of MISP maltego in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.4.5), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In MISP maltego, 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

MISP MISP-maltego 1.4.4 incorrectly shares a MISP connection across users in a remote-transform use case. Version 1.4.5 contains a patch.

CVE-2020-12889 Affected MISP maltego Versions

1 component(s)
Fixed Versions:
1.4.5
Product / Package Ecosystem Affected Versions Fixed Version
MISP-maltego
pypi/MISP-maltego
PyPI
< 1.4.5
1.4.5

References

NVD — CVE-2020-12889 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-12889
Security Fix Commit FIX COMMIT
https://github.com/MISP/MISP-maltego/commit/3ccde66dab4096ab5663e69f352992cc73e1160b
MISP maltego Source Repository REPOSITORY
https://github.com/MISP/MISP-maltego
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-fj35-m94r-9h4c
MISP maltego Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/misp-maltego/PYSEC-2020-66.yaml

Frequently Asked Questions

What is CVE-2020-12889?
CVE-2020-12889 is a security vulnerability in MISP maltego involving Maltego incorrectly shares a MISP connection across users in a remote-transform use case under CWE-284: Improper Access Control.
Which MISP maltego versions are affected?
Affected versions include releases prior to 1.4.5 across affected packages: MISP-maltego.
What version fixes CVE-2020-12889?
Upgrading to 1.4.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is MISP-maltego affected?
Yes, MISP-maltego is affected in releases prior to 1.4.5. Upgrade your dependency to 1.4.5 or later.
What is the CVSS score of CVE-2020-12889?
CVE-2020-12889 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2020-12889?
CVE-2020-12889 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check PyPI dependencies for CVE-2020-12889?
Run the dependency tree command: 'pip show MISP-maltego'. 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-fj35-m94r-9h4c",
  "modified" : "2022-07-28T22:05:27Z",
  "published" : "2022-05-24T17:17:59Z",
  "aliases" : [ "CVE-2020-12889" ],
  "summary" : "Maltego incorrectly shares a MISP connection across users in a remote-transform use case",
  "details" : "MISP MISP-maltego 1.4.4 incorrectly shares a MISP connection across users in a remote-transform use case. Version 1.4.5 contains a patch.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "MISP-maltego"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.4.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-12889"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/MISP/MISP-maltego/commit/3ccde66dab4096ab5663e69f352992cc73e1160b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/MISP/MISP-maltego"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-fj35-m94r-9h4c"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/misp-maltego/PYSEC-2020-66.yaml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-07-28T22:05:27Z",
    "nvd_published_at" : "2020-05-15T18:15:00Z"
  }
}