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Arbitrary JavaScript execution due to using outdated libraries

Low severity GitHub Reviewed Published Jun 4, 2024 in freddyaboulton/gradio-pdf • Updated Jun 5, 2024

Package

pip gradio_pdf (pip)

Affected versions

< 0.0.10

Patched versions

0.0.10

Description

Summary

gradio-pdf projects with dependencies on the pdf.js library are vulnerable to CVE-2024-4367, which allows arbitrary JavaScript execution.

PoC

  1. Generate a pdf file with a malicious script in the fontmatrix. (This will run alert(‘XSS’).)
    poc.pdf

  2. Run the app. In this PoC, I've used the demo for a simple proof.
    1

  3. Upload a PDF file containing the script.
    2

  4. Check that the script is running.
    3

Impact

Malicious scripts can be injected into the code, and when linked with vulnerabilities such as CSRF, it can cause even greater damage. In particular, It can become a source of further attacks, especially when linked to social engineering.

Mitigation

Upgrade the pdf.js to v4.2.67, which removes the vulnerability. (or set the option isEvalSupported to false.)

Reference

  1. https://codeanlabs.com/blog/research/cve-2024-4367-arbitrary-js-execution-in-pdf-js/
  2. mozilla/pdf.js#18015

References

@freddyaboulton freddyaboulton published to freddyaboulton/gradio-pdf Jun 4, 2024
Published to the GitHub Advisory Database Jun 5, 2024
Reviewed Jun 5, 2024
Last updated Jun 5, 2024

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

EPSS score

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-4m3g-6r7g-jv4f

Source code

Credits

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