Improper Restriction of Excessive Authentication Attempts Affecting firefox package, versions <91.0-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.95% (57th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOX-1538500
  • published11 Aug 2021
  • disclosed17 Aug 2021

Introduced: 11 Aug 2021

CVE-2021-29987  (opens in a new tab)
CWE-307  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox to version 91.0-1 or higher.

NVD Description

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

After requesting multiple permissions, and closing the first permission panel, subsequent permission panels will be displayed in a different position but still record a click in the default location, making it possible to trick a user into accepting a permission they did not want to. This bug only affects Firefox on Linux. Other operating systems are unaffected.. This vulnerability affects Firefox < 91 and Thunderbird < 91.

CVSS Base Scores

version 3.1