Improper Certificate Validation Affecting firefox-esr package, versions <102.12.0esr-1


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.11% (46th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOXESR-5668839
  • published7 Jun 2023
  • disclosed19 Jun 2023

Introduced: 7 Jun 2023

CVE-2023-34414  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox-esr to version 102.12.0esr-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:unstable relevant fixed versions and status.

The error page for sites with invalid TLS certificates was missing the activation-delay Firefox uses to protect prompts and permission dialogs from attacks that exploit human response time delays. If a malicious page elicited user clicks in precise locations immediately before navigating to a site with a certificate error and made the renderer extremely busy at the same time, it could create a gap between when the error page was loaded and when the display actually refreshed. With the right timing the elicited clicks could land in that gap and activate the button that overrides the certificate error for that site. This vulnerability affects Firefox ESR < 102.12, Firefox < 114, and Thunderbird < 102.12.

CVSS Scores

version 3.1