CVE-2024-29179: Phpmyfaq/phpmyfaq Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-hm8r-95g3-5hj9
CVSS 4.3
CWE-79
Published
Advisory Summary

CVE-2024-29179 is a MODERATE (CVSS 4.3) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Phpmyfaq/phpmyfaq libraries in the Packagist ecosystem. The issue involves phpmyfaq stored cross-site scripting at file attachments. Remediation is available by upgrading affected packages to version 3.2.6.

CVE-2024-29179 at a Glance

CVE Identifier CVE-2024-29179
GHSA Identifier GHSA-hm8r-95g3-5hj9
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Phpmyfaq/phpmyfaq
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 4.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2024-29179

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

phpmyfaq/phpmyfaq fixed: 3.2.6
Upgrade phpmyfaq/phpmyfaq to 3.2.6
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 phpmyfaq/phpmyfaq

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-29179, inspect your project dependencies for Phpmyfaq/phpmyfaq:

inspect dependencies for phpmyfaq/phpmyfaq

Analyze the terminal output to locate any version of Phpmyfaq/phpmyfaq in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.2.6), 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Phpmyfaq/phpmyfaq, 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

### Summary An attacker with admin privileges can upload an attachment containing JS code without extension and the application will render it as HTML which allows for XSS attacks. ### Details When attachments are uploaded without an extension, the application renders it as HTML by default. Therefore allowing attackers to upload .html files containing javascript code to perform XSS attacks. The direct file path to the uploaded attachment is also easily obtainable as it is made up of substrings of the file's MD5 hashes. ### PoC 1. Admin users can upload attachments containing XSS payloads in files without extensions to bypass the .html extension check. ![image](https://github.com/thorsten/phpMyFAQ/assets/63487456/5c3c4222-550e-44c7-95ee-fd85562fffd5) 2. Since the path of the uploaded file is built entirely on the file’s MD5 hash and the attachment directory, it is possible for an attacker to know the direct path of the uploaded file. E.g file MD5 hash: 38fff51cb7248a06d6142c6bdf846831 URL will be: http://127.0.0.1/phpmyfaq/attachments/38fff/51cb7/248a0/6d6142c6bdf846831 - /attachments - /38fff (first 5 chars of MD5 hash) - /51cb7 (next 5 chars of MD5 hash) - /248a0 (next 5 chars of MD5 hash) - /6d6142c6bdf846831 (remaining chars of MD5 hash) 3. Even though the attachment was uploaded without a file extension, it is still rendered as .html, hence triggering the XSS payload. ![image](https://github.com/thorsten/phpMyFAQ/assets/63487456/663954ec-0210-4788-a841-7daa3fb547c3) ### Impact This allows an attacker to execute arbitrary client side JavaScript within the context of another user's phpMyFAQ session.

CVE-2024-29179 Affected Phpmyfaq/phpmyfaq Versions

1 component(s)
Fixed Versions:
3.2.6
Product / Package Ecosystem Affected Versions Fixed Version
phpmyfaq/phpmyfaq
Packagist
≥ 3.2.5
< 3.2.6
All 1 versions
3.2.5
3.2.6

References

Frequently Asked Questions

What is CVE-2024-29179?
CVE-2024-29179 is a security vulnerability in Phpmyfaq/phpmyfaq involving phpMyFAQ Stored Cross-site Scripting at File Attachments under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Phpmyfaq/phpmyfaq versions are affected?
Affected versions include releases prior to 3.2.6 across affected packages: phpmyfaq/phpmyfaq.
What version fixes CVE-2024-29179?
Upgrading to 3.2.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is phpmyfaq/phpmyfaq affected?
Yes, phpmyfaq/phpmyfaq is affected in releases prior to 3.2.6. Upgrade your dependency to 3.2.6 or later.
What is the CVSS score of CVE-2024-29179?
CVE-2024-29179 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2024-29179?
CVE-2024-29179 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2024-29179?
Run the dependency tree command: 'inspect dependencies for phpmyfaq/phpmyfaq'. 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
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hm8r-95g3-5hj9",
  "modified" : "2024-03-25T22:31:44Z",
  "published" : "2024-03-25T19:45:12Z",
  "aliases" : [ "CVE-2024-29179" ],
  "summary" : "phpMyFAQ Stored Cross-site Scripting at File Attachments",
  "details" : "### Summary\nAn attacker with admin privileges can upload an attachment containing JS code without extension and the application will render it as HTML which allows for XSS attacks.\n\n### Details\nWhen attachments are uploaded without an extension, the application renders it as HTML by default. Therefore allowing attackers to upload .html files containing javascript code to perform XSS attacks. The direct file path to the uploaded attachment is also easily obtainable as it is made up of substrings of the file's MD5 hashes.\n\n### PoC\n1. Admin users can upload attachments containing XSS payloads in files without extensions to bypass the .html extension check.\n![image](https://github.com/thorsten/phpMyFAQ/assets/63487456/5c3c4222-550e-44c7-95ee-fd85562fffd5)\n\n2. Since the path of the uploaded file is built entirely on the file’s MD5 hash and the attachment directory, it is possible for an attacker to know the direct path of the uploaded file.\n\n  E.g file MD5 hash: 38fff51cb7248a06d6142c6bdf846831\n\n    URL will be: http://127.0.0.1/phpmyfaq/attachments/38fff/51cb7/248a0/6d6142c6bdf846831\n\n    - /attachments\n    - /38fff (first 5 chars of MD5 hash)\n    - /51cb7 (next 5 chars of MD5 hash)\n    - /248a0 (next 5 chars of MD5 hash)\n    - /6d6142c6bdf846831 (remaining chars of MD5 hash)\n\n3.  Even though the attachment was uploaded without a file extension, it is still rendered as .html, hence triggering the XSS payload.\n![image](https://github.com/thorsten/phpMyFAQ/assets/63487456/663954ec-0210-4788-a841-7daa3fb547c3)\n\n### Impact\nThis allows an attacker to execute arbitrary client side JavaScript within the context of another user's phpMyFAQ session.\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "phpmyfaq/phpmyfaq"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.2.5"
      }, {
        "fixed" : "3.2.6"
      } ]
    } ],
    "versions" : [ "3.2.5" ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-hm8r-95g3-5hj9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-29179"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/thorsten/phpMyFAQ"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-03-25T19:45:12Z",
    "nvd_published_at" : "2024-03-25T21:15:47Z"
  }
}