Authentication Bypass Affecting firefox-esr package, versions <78.9.0esr-1


0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Integrity High

    Threat Intelligence

    EPSS 0.13% (47th percentile)
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NVD
6.5 medium
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SUSE
6.1 medium
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Red Hat
6.1 medium

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  • Snyk ID SNYK-DEBIAN12-FIREFOXESR-1546259
  • published 24 Mar 2021
  • disclosed 31 Mar 2021

How to fix?

Upgrade Debian:12 firefox-esr to version 78.9.0esr-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Debian. See How to fix? for Debian:12 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.