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Vulnerability · Published Nov 21, 2023 · Assigned by mozilla

CVE-2023-6206

Medium 5.4

In plain English

A medium-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.4Medium
Exploit odds (30 days)0.6%top 49.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8firefox115.5.0-1.el8_9.alma.1ALSA-2023:7508
AlmaLinux:9firefox115.5.0-1.el9_3.alma.1ALSA-2023:7507
AlmaLinux:9firefox-x11115.5.0-1.el9_3.alma.1ALSA-2023:7507
AlmaLinux:8thunderbird115.5.0-1.el8_9.alma.1ALSA-2023:7500
AlmaLinux:9thunderbird115.5.0-1.el9_3.almaALSA-2023:7501
Alpine:v3.20firefox-esr115.5.0-r0ALPINE-CVE-2023-6206
Alpine:v3.21firefox-esr115.5.0-r0ALPINE-CVE-2023-6206
Alpine:v3.22firefox-esr115.5.0-r0ALPINE-CVE-2023-6206
Alpine:v3.23firefox-esr115.5.0-r0ALPINE-CVE-2023-6206
Alpine:v3.20thunderbird115.5.0-r0ALPINE-CVE-2023-6206
Alpine:v3.21thunderbird115.5.0-r0ALPINE-CVE-2023-6206
Alpine:v3.22thunderbird115.5.0-r0ALPINE-CVE-2023-6206
Alpine:v3.23thunderbird115.5.0-r0ALPINE-CVE-2023-6206
Debian:12firefox-esr115.5.0esr-1~deb12u1DSA-5561-1
Debian:12firefox-esr115.5.0esr-1~deb12u1DEBIAN-CVE-2023-6206
Debian:13firefox-esr115.5.0esr-1DEBIAN-CVE-2023-6206
Debian:14firefox-esr115.5.0esr-1DEBIAN-CVE-2023-6206
Debian:12thunderbird1:115.5.0-1~deb12u1DSA-5566-1
Debian:12thunderbird1:115.5.0-1~deb12u1DEBIAN-CVE-2023-6206
Debian:13thunderbird1:115.5.0-1DEBIAN-CVE-2023-6206
Debian:14thunderbird1:115.5.0-1DEBIAN-CVE-2023-6206
Rocky Linux:8thunderbird0:115.5.0-1.el8_9RLSA-2023:7500
Ubuntu:22.04:LTSmozjs102no fix listedUBUNTU-CVE-2023-6206
Ubuntu:24.04:LTSmozjs102no fix listedUBUNTU-CVE-2023-6206
Ubuntu:22.04:LTSmozjs78no fix listedUBUNTU-CVE-2023-6206
Ubuntu:22.04:LTSmozjs91no fix listedUBUNTU-CVE-2023-6206
Ubuntu:22.04:LTSthunderbird1:115.5.0+build1-0ubuntu0.22.04.1USN-6515-1
Ubuntu:22.04:LTSthunderbird1:115.5.0+build1-0ubuntu0.22.04.1UBUNTU-CVE-2023-6206
Ubuntu:24.04:LTSthunderbird1:115.5.0+build1-0ubuntu1UBUNTU-CVE-2023-6206

Affected products (as reported)

VendorProductVersions
Mozilla Firefox unspecified – before 120
Mozilla Firefox ESR unspecified – before 115.5.0
Mozilla Thunderbird unspecified – before 115.5

References