GHSA-4m3g-6r7g-jv4f Arbitrary JavaScript execution due to using outdated libraries
Attackers can execute arbitrary JavaScript by uploading malicious PDFs to applications using the vulnerable gradio-pdf library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is GHSA-4m3g-6r7g-jv4f?
GHSA-4m3g-6r7g-jv4f is a cross-site scripting vulnerability in gradio-pdf, published on 5 Jun 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Summary
gradio-pdf projects with dependencies on the pdf.js library are vulnerable to CVE-2024-4367, which allows arbitrary JavaScript execution.
PoC
Generate a pdf file with a malicious script in the fontmatrix. (This will run
alert(‘XSS’).) poc.pdfRun the app. In this PoC, I've used the demo for a simple proof.
Upload a PDF file containing the script.
Check that the script is running.
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
Which versions are affected by GHSA-4m3g-6r7g-jv4f?
2 open source packages ship an affected version, including gradio-pdf and gradio_pdf.
| Package | Affected | Fixed in |
|---|---|---|
gradio-pdf PyPI | All versions | 0.0.10 |
gradio_pdf PyPI | All versions | 0.0.10 |
How do I fix GHSA-4m3g-6r7g-jv4f?
Upgrade gradio-pdf to 0.0.10 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is GHSA-4m3g-6r7g-jv4f being exploited?
There is no known exploitation of GHSA-4m3g-6r7g-jv4f in the wild and no public exploit code.