CVE-2023-44463: Pretix Pretix Potential IP Address Spoofing Vulnerability

MODERATE
Advisory Identifier: GHSA-j9gq-w73w-9h6c
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CVSS 5.3
CWE-290
Published
Advisory Summary

CVE-2023-44463 is a MODERATE (CVSS 5.3) pretix potential ip address spoofing vulnerability (CWE-290: Authentication Bypass by Spoofing) affecting Pretix libraries in the PyPI ecosystem. The issue involves pretix potential ip address spoofing vulnerability. Remediation is available by upgrading affected packages to version 2023.7.1.

CVE-2023-44463 at a Glance

CVE Identifier CVE-2023-44463
GHSA Identifier GHSA-j9gq-w73w-9h6c
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-290: Authentication Bypass by Spoofing
Affected Product Pretix
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:L/A:N).

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 Low (I:L)
Availability None (A:N)

How to Fix CVE-2023-44463

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

pretix fixed: 2023.7.1 
pip install pretix>=2023.7.1
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 pretix

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2023-44463, inspect your installed packages using pip:

pip show pretix

Analyze the terminal output to locate any version of Pretix in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2023.7.1), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-290: Authentication Bypass by Spoofing, where this attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. In Pretix, 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

An issue was discovered in pretix before 2023.7.1. Incorrect parsing of configuration files causes the application to trust unchecked X-Forwarded-For headers even though it has not been configured to do so. This can lead to IP address spoofing by users of the application.

CVE-2023-44463 Affected Pretix Versions

1 component(s)
Fixed Versions:
2023.7.1
Product / Package Ecosystem Affected Versions Fixed Version
pretix
pypi/pretix
PyPI
< 2023.7.1
2023.7.1

References

NVD — CVE-2023-44463 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-44463
Security Fix Commit FIX COMMIT
https://github.com/pretix/pretix/commit/ccdce2ccb8207b82501af3c03f50abc0f819b469
Pretix Source Repository REPOSITORY
https://github.com/pretix/pretix
Pretix Source Repository REPOSITORY
https://github.com/pretix/pretix/compare/v2023.7.0...v2023.7.1
Pretix Source Repository REPOSITORY
https://github.com/pretix/pretix/tags
Pretix Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/pretix/PYSEC-2023-187.yaml
Pretix Release RELEASE
https://pretix.eu/about/en/blog/20230911-release-2023-7-1
Pretix Security Information SECURITY
https://pretix.eu/about/en/ticketing

Frequently Asked Questions

What is CVE-2023-44463?
CVE-2023-44463 is a security vulnerability in Pretix involving pretix potential IP address spoofing vulnerability under CWE-290: Authentication Bypass by Spoofing.
Which Pretix versions are affected?
Affected versions include releases prior to 2023.7.1 across affected packages: pretix.
What version fixes CVE-2023-44463?
Upgrading to 2023.7.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pretix affected?
Yes, pretix is affected in releases prior to 2023.7.1. Upgrade your dependency to 2023.7.1 or later.
What is the CVSS score of CVE-2023-44463?
CVE-2023-44463 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2023-44463?
CVE-2023-44463 is classified under CWE-290: Authentication Bypass by Spoofing (This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.).
How can I check PyPI dependencies for CVE-2023-44463?
Run the dependency tree command: 'pip show pretix'. 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-j9gq-w73w-9h6c",
  "modified" : "2024-10-21T20:53:25Z",
  "published" : "2023-10-02T21:30:17Z",
  "aliases" : [ "CVE-2023-44463" ],
  "summary" : "pretix potential IP address spoofing vulnerability",
  "details" : "An issue was discovered in pretix before 2023.7.1. Incorrect parsing of configuration files causes the application to trust unchecked X-Forwarded-For headers even though it has not been configured to do so. This can lead to IP address spoofing by users of the application.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "pretix"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2023.7.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-44463"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pretix/pretix/commit/ccdce2ccb8207b82501af3c03f50abc0f819b469"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pretix/pretix"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pretix/pretix/compare/v2023.7.0...v2023.7.1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pretix/pretix/tags"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/pretix/PYSEC-2023-187.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://pretix.eu/about/en/blog/20230911-release-2023-7-1"
  }, {
    "type" : "WEB",
    "url" : "https://pretix.eu/about/en/ticketing"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-290" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-10-04T14:12:10Z",
    "nvd_published_at" : "2023-10-02T20:15:10Z"
  }
}