CVE-2023-34414
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.
Does this matter?
Lower severity and a low EPSS score (0.90%). Track it; it rarely justifies an emergency change on its own.
Description
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 3.1
- 3.1 LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
- EPSS
- 0.90% probability · 58th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- mozilla/firefox · mozilla/firefox esr · mozilla/thunderbird
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1695986Permissions Required
- https://security.gentoo.org/glsa/202312-03
- https://security.gentoo.org/glsa/202401-10
- https://www.mozilla.org/security/advisories/mfsa2023-19/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-20/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-21/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1695986Permissions Required
- https://security.gentoo.org/glsa/202312-03
- https://security.gentoo.org/glsa/202401-10
- https://www.mozilla.org/security/advisories/mfsa2023-19/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-20/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-21/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.