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Content-Security-Policy header generation in middleware could be compromised by malicious injections

High
castarco published GHSA-w387-5qqw-7g8m Mar 27, 2024

Package

npm @kindspells/astro-shield (npm)

Affected versions

1.2.0

Patched versions

>=1.3.0

Description

Impact

When the following conditions are met:

  • Automated CSP headers generation for SSR content is enabled
  • The web application serves content that can be partially controlled by external users

Then it is possible that the CSP headers generation feature might be "allow-listing" malicious injected resources like inlined JS, or references to external malicious scripts.

Patches

Available in version 1.3.0 .

Workarounds

  • Do not enable CSP headers generation.
  • Use it only for dynamically generated content that cannot be controlled by external users in any way.

References

Are there any links users can visit to find out more?

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
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
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:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVE ID

CVE-2024-29896

Weaknesses

No CWEs

Credits