CVE-2020-4041: Bolt/bolt Cross-Site Scripting Vulnerability

HIGH
Advisory Identifier: GHSA-68q3-7wjp-7q3j
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CVSS 7.4
CWE-79
Published
Advisory Summary

CVE-2020-4041 is a HIGH (CVSS 7.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Bolt/bolt libraries in the Packagist ecosystem. The issue involves the filename of uploaded files vulnerable to stored xss. Remediation is available by upgrading affected packages to version 3.7.1.

CVE-2020-4041 at a Glance

CVE Identifier CVE-2020-4041
GHSA Identifier GHSA-68q3-7wjp-7q3j
Severity HIGH
CVSS v3.1 Base Score 7.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Bolt/bolt
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.4

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:R/S:C/C:N/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2020-4041

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

bolt/bolt fixed: 3.7.1 
Upgrade bolt/bolt to 3.7.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for bolt/bolt

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-4041, inspect your project dependencies for Bolt/bolt:

inspect dependencies for bolt/bolt

Analyze the terminal output to locate any version of Bolt/bolt in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.7.1), 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 Bolt/bolt, 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

### Impact The filename of uploaded files was vulnerable to stored XSS. It is not possible to inject javascript code in the file name when creating/uploading the file. But, once created/uploaded, it can be renamed to inject the payload in it. Additionally, the measures to prevent renaming the file to disallowed filename extensions could be circumvented. ### Patches This is fixed in Bolt 3.7.1. ### References Related issue: https://github.com/bolt/bolt/pull/7853

CVE-2020-4041 Affected Bolt/bolt Versions

1 component(s)
Fixed Versions:
3.7.1
Product / Package Ecosystem Affected Versions Fixed Version
bolt/bolt
 Packagist
< 3.7.1
3.7.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/bolt/bolt/security/advisories/GHSA-68q3-7wjp-7q3j
NVD — CVE-2020-4041 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-4041
Bolt/bolt Source Repository REPOSITORY
https://github.com/bolt/bolt/pull/7853
Security Fix Commit FIX COMMIT
https://github.com/bolt/bolt/commit/b42cbfcf3e3108c46a80581216ba03ef449e419f
Bolt/bolt Source Repository REPOSITORY
https://github.com/bolt/bolt
Bolt/bolt Security Information SECURITY
http://packetstormsecurity.com/files/158299/Bolt-CMS-3.7.0-XSS-CSRF-Shell-Upload.html
seclists.org/fulldisclosure/2020... WEB
http://seclists.org/fulldisclosure/2020/Jul/4

Frequently Asked Questions

What is CVE-2020-4041?
CVE-2020-4041 is a security vulnerability in Bolt/bolt involving The filename of uploaded files vulnerable to stored XSS under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Bolt/bolt versions are affected?
Affected versions include releases prior to 3.7.1 across affected packages: bolt/bolt.
What version fixes CVE-2020-4041?
Upgrading to 3.7.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is bolt/bolt affected?
Yes, bolt/bolt is affected in releases prior to 3.7.1. Upgrade your dependency to 3.7.1 or later.
What is the CVSS score of CVE-2020-4041?
CVE-2020-4041 has a CVSS v3.1 base score of 7.4 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N.
What CWE is associated with CVE-2020-4041?
CVE-2020-4041 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-2020-4041?
Run the dependency tree command: 'inspect dependencies for bolt/bolt'. 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-68q3-7wjp-7q3j",
  "modified" : "2022-10-07T20:40:49Z",
  "published" : "2020-06-09T00:25:34Z",
  "aliases" : [ "CVE-2020-4041" ],
  "summary" : "The filename of uploaded files vulnerable to stored XSS",
  "details" : "### Impact\n\nThe filename of uploaded files was vulnerable to stored XSS. It is not possible to inject javascript code in the file name when creating/uploading the file. But, once created/uploaded, it can be renamed to inject the payload in it. \n\nAdditionally, the measures to prevent renaming the file to disallowed filename extensions could be circumvented.\n\n### Patches\n\nThis is fixed in Bolt 3.7.1.\n\n### References\n\nRelated issue: https://github.com/bolt/bolt/pull/7853",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "bolt/bolt"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.7.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/bolt/bolt/security/advisories/GHSA-68q3-7wjp-7q3j"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-4041"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/bolt/bolt/pull/7853"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/bolt/bolt/commit/b42cbfcf3e3108c46a80581216ba03ef449e419f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/bolt/bolt"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/158299/Bolt-CMS-3.7.0-XSS-CSRF-Shell-Upload.html"
  }, {
    "type" : "WEB",
    "url" : "http://seclists.org/fulldisclosure/2020/Jul/4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-08T23:14:12Z",
    "nvd_published_at" : "2020-06-08T22:15:00Z"
  }
}