CVE-2020-5777: Dweeves/magmi Authentication Bypass Vulnerability

CRITICAL
Advisory Identifier: GHSA-g475-pch5-6wvv
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CVSS 9.8
CWE-287
Published
Advisory Summary

CVE-2020-5777 is a CRITICAL (CVSS 9.8) authentication bypass vulnerability (CWE-287: Improper Authentication) affecting Dweeves/magmi libraries in the Packagist ecosystem. The issue involves authentication bypass in magmi. Remediation is available by upgrading affected packages to version 0.7.24.

CVE-2020-5777 at a Glance

CVE Identifier CVE-2020-5777
GHSA Identifier GHSA-g475-pch5-6wvv
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-287: Improper Authentication
Affected Product Dweeves/magmi
Package Ecosystem Packagist
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-2020-5777

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

dweeves/magmi fixed: 0.7.24 
Upgrade dweeves/magmi to 0.7.24
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 dweeves/magmi

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-5777, inspect your project dependencies for Dweeves/magmi:

inspect dependencies for dweeves/magmi

Analyze the terminal output to locate any version of Dweeves/magmi in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.7.24), 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-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Dweeves/magmi, 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

MAGMI versions prior to 0.7.24 are vulnerable to a remote authentication bypass due to allowing default credentials in the event there is a database connection failure. A remote attacker can trigger this connection failure if the Mysql setting max_connections (default 151) is lower than Apache (or another web server) setting MaxRequestWorkers (formerly MaxClients) (default 256). This can be done by sending at least 151 simultaneous requests to the Magento website to trigger a "Too many connections" error, then use default magmi:magmi basic authentication to remotely bypass authentication.

CVE-2020-5777 Affected Dweeves/magmi Versions

1 component(s)
Fixed Versions:
0.7.24
Product / Package Ecosystem Affected Versions Fixed Version
dweeves/magmi
 Packagist
< 0.7.24
0.7.24

References

NVD — CVE-2020-5777 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5777
Security Fix Commit FIX COMMIT
https://github.com/dweeves/magmi-git/commit/dde71de5cfd505fe78e5caf21d6531b61450a16f
Dweeves/magmi Security Information SECURITY
https://www.tenable.com/security/research/tra-2020-51

Frequently Asked Questions

What is CVE-2020-5777?
CVE-2020-5777 is a security vulnerability in Dweeves/magmi involving Authentication bypass in MAGMI under CWE-287: Improper Authentication.
Which Dweeves/magmi versions are affected?
Affected versions include releases prior to 0.7.24 across affected packages: dweeves/magmi.
What version fixes CVE-2020-5777?
Upgrading to 0.7.24 (or the latest patched release for your respective branch) resolves the vulnerability.
Is dweeves/magmi affected?
Yes, dweeves/magmi is affected in releases prior to 0.7.24. Upgrade your dependency to 0.7.24 or later.
What is the CVSS score of CVE-2020-5777?
CVE-2020-5777 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-2020-5777?
CVE-2020-5777 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check Packagist dependencies for CVE-2020-5777?
Run the dependency tree command: 'inspect dependencies for dweeves/magmi'. 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-g475-pch5-6wvv",
  "modified" : "2021-05-05T19:06:27Z",
  "published" : "2021-05-06T18:54:35Z",
  "aliases" : [ "CVE-2020-5777" ],
  "summary" : "Authentication bypass in MAGMI",
  "details" : "MAGMI versions prior to 0.7.24 are vulnerable to a remote authentication bypass due to allowing default credentials in the event there is a database connection failure. A remote attacker can trigger this connection failure if the Mysql setting max_connections (default 151) is lower than Apache (or another web server) setting MaxRequestWorkers (formerly MaxClients) (default 256). This can be done by sending at least 151 simultaneous requests to the Magento website to trigger a \"Too many connections\" error, then use default magmi:magmi basic authentication to remotely bypass authentication.",
  "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" : "Packagist",
      "name" : "dweeves/magmi"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.7.24"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-5777"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dweeves/magmi-git/commit/dde71de5cfd505fe78e5caf21d6531b61450a16f"
  }, {
    "type" : "WEB",
    "url" : "https://www.tenable.com/security/research/tra-2020-51"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-05T19:06:27Z",
    "nvd_published_at" : "2020-09-01T21:15:00Z"
  }
}