CVE-2023-0777: Modoboa Authentication Bypass Vulnerability

CRITICAL
Advisory Identifier: GHSA-rfhw-fm4m-52j6
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CVSS 9.8
CWE-305
Published
Advisory Summary

CVE-2023-0777 is a CRITICAL (CVSS 9.8) authentication bypass vulnerability (CWE-305: Authentication Bypass by Primary Weakness) affecting Modoboa libraries in the PyPI ecosystem. The issue involves authentication bypass in modoboa. Remediation is available by upgrading affected packages to version 2.0.4.

CVE-2023-0777 at a Glance

CVE Identifier CVE-2023-0777
GHSA Identifier GHSA-rfhw-fm4m-52j6
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-305: Authentication Bypass by Primary Weakness
Affected Product Modoboa
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-2023-0777

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

modoboa fixed: 2.0.4 
pip install modoboa>=2.0.4
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 modoboa

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2023-0777, inspect your installed packages using pip:

pip show modoboa

Analyze the terminal output to locate any version of Modoboa in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.4), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-305: Authentication Bypass by Primary Weakness, where the authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error. In Modoboa, 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

Authentication Bypass by Primary Weakness in GitHub repository modoboa/modoboa prior to 2.0.4.

CVE-2023-0777 Affected Modoboa Versions

1 component(s)
Fixed Versions:
2.0.4
Product / Package Ecosystem Affected Versions Fixed Version
modoboa
pypi/modoboa
PyPI
< 2.0.4
2.0.4

References

NVD — CVE-2023-0777 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-0777
Security Fix Commit FIX COMMIT
https://github.com/modoboa/modoboa/commit/47d17ac6643f870719691073956a26e4be0a4806
Modoboa Source Repository REPOSITORY
https://github.com/modoboa/modoboa
Modoboa Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/modoboa/PYSEC-2023-32.yaml
huntr.dev/bounties/a17e7a9f-0... WEB
https://huntr.dev/bounties/a17e7a9f-0fee-4130-a522-5a0466fc17c7
Modoboa Security Information SECURITY
http://packetstormsecurity.com/files/171744/modoboa-2.0.4-Admin-Takeover.html

Frequently Asked Questions

What is CVE-2023-0777?
CVE-2023-0777 is a security vulnerability in Modoboa involving Authentication Bypass in modoboa under CWE-305: Authentication Bypass by Primary Weakness.
Which Modoboa versions are affected?
Affected versions include releases prior to 2.0.4 across affected packages: modoboa.
What version fixes CVE-2023-0777?
Upgrading to 2.0.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is modoboa affected?
Yes, modoboa is affected in releases prior to 2.0.4. Upgrade your dependency to 2.0.4 or later.
What is the CVSS score of CVE-2023-0777?
CVE-2023-0777 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-2023-0777?
CVE-2023-0777 is classified under CWE-305: Authentication Bypass by Primary Weakness (The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.).
How can I check PyPI dependencies for CVE-2023-0777?
Run the dependency tree command: 'pip show modoboa'. 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-rfhw-fm4m-52j6",
  "modified" : "2024-09-24T21:22:33Z",
  "published" : "2023-02-10T21:30:24Z",
  "aliases" : [ "CVE-2023-0777" ],
  "summary" : "Authentication Bypass in modoboa",
  "details" : "Authentication Bypass by Primary Weakness in GitHub repository modoboa/modoboa prior to 2.0.4.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "modoboa"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.0.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.0.3"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-0777"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/modoboa/modoboa/commit/47d17ac6643f870719691073956a26e4be0a4806"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/modoboa/modoboa"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/modoboa/PYSEC-2023-32.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.dev/bounties/a17e7a9f-0fee-4130-a522-5a0466fc17c7"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/171744/modoboa-2.0.4-Admin-Takeover.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-305" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-02-10T22:31:45Z",
    "nvd_published_at" : "2023-02-10T19:15:00Z"
  }
}