CVE-2023-34414
LowCVSS 3.1Exploitation Probability (EPSS)
Elevated risk55th percentile — higher than 55% of all known CVEs
Summary
The vulnerability affects sites with invalid TLS certificates, where the activation-delay in Firefox was missing. A malicious page could exploit this flaw to trick users into clicking in precise locations, potentially bypassing the certificate error.
Risk Assessment
Organizations may be exposed to attacks that exploit human response delays, leading to unauthorized access to resources protected by TLS certificates.
Recommendation
It is recommended to update Firefox and Thunderbird to the latest versions to mitigate the risk associated with this vulnerability.
Original NVD description (English source)
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.