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ubuntucveUbuntu.comUB:CVE-2023-6206
HistoryNov 21, 2023 - 12:00 a.m.

CVE-2023-6206

2023-11-2100:00:00
ubuntu.com
ubuntu.com
5
firefox
thunderbird
black fade animation
fullscreen
anti-clickjacking
vulnerability
permission prompts

5.4 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

32.7%

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.

Notes

Author Note
tyhicks mozjs contains a copy of the SpiderMonkey JavaScript engine
mdeslaur starting with Ubuntu 22.04, the firefox package is just a script that installs the Firefox snap

5.4 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

32.7%