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WeasyPrint allows the attachment of arbitrary files and URLs to a PDF

High severity GitHub Reviewed Published Mar 8, 2024 in Kozea/WeasyPrint • Updated Apr 1, 2024

Package

pip weasyprint (pip)

Affected versions

>= 61.0, <= 61.1

Patched versions

61.2

Description

Impact

Since version 61.0, there's a vulnerability which allows attaching content of arbitrary files and URLs to a generated PDF document, even if url_fetcher is configured to prevent access to files and URLs.

Patches

Fixed by 734ee8e that’s included in 61.2

Workarounds

  • Check that no PDF attachment is defined in source HTML.
  • Launch WeasyPrint in a sandbox that prevents access to the filesystem and the network.

References

@liZe liZe published to Kozea/WeasyPrint Mar 8, 2024
Published to the GitHub Advisory Database Mar 8, 2024
Reviewed Mar 8, 2024
Published by the National Vulnerability Database Mar 9, 2024
Last updated Apr 1, 2024

Severity

High

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
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

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:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

EPSS score

0.045%
(16th percentile)

Weaknesses

CVE ID

CVE-2024-28184

GHSA ID

GHSA-35jj-wx47-4w8r

Source code

Credits

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