Insufficient Granularity of Access Control Affecting thunderbird package, versions <0:128.9.2-1.el9_5


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.03% (8th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL9-THUNDERBIRD-9779439
  • published19 Apr 2025
  • disclosed15 Apr 2025

Introduced: 15 Apr 2025

NewCVE-2025-3522  (opens in a new tab)
CWE-1220  (opens in a new tab)

How to fix?

Upgrade RHEL:9 thunderbird to version 0:128.9.2-1.el9_5 or higher.
This issue was patched in RHSA-2025:4229.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to determine file size, and navigates to it when the user clicks the attachment. Because the URL is not validated or sanitized, it can reference internal resources like chrome:// or SMB share file:// links, potentially leading to hashed Windows credential leakage and opening the door to more serious security issues. This vulnerability affects Thunderbird < 137.0.2 and Thunderbird < 128.9.2.

CVSS Base Scores

version 3.1