Improper Restriction of Rendered UI Layers or Frames Affecting thunderbird package, versions <0:78.9.0-3.el7_9


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.13% (49th percentile)

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  • Snyk IDSNYK-RHEL7-THUNDERBIRD-8014854
  • published17 Sept 2024
  • disclosed23 Mar 2021

Introduced: 23 Mar 2021

CVE-2021-23984  (opens in a new tab)
CWE-1021  (opens in a new tab)

How to fix?

Upgrade RHEL:7 thunderbird to version 0:78.9.0-3.el7_9 or higher.
This issue was patched in RHSA-2021:0996.

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:7 relevant fixed versions and status.

A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.

CVSS Scores

version 3.1