When displaying the sender of an email, and the sender name contained the Braille Pattern Blank space character multiple times, Thunderbird would have displayed all the spaces. This could have been used by an attacker to send an email message with the attacker's digital signature, that was shown with an arbitrary sender email address chosen by the attacker. If the sender name started with a false email address, followed by many Braille space characters, the attacker's email address was not visible. Because Thunderbird compared the invisible sender address with the signature's email address, if the signing key or certificate was accepted by Thunderbird, the email was shown as having a valid digital signature. This vulnerability affects Thunderbird < 91.10.
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
|Base Score:||6.5||Base Metrics:||AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N|
|Access Vector:||Network||Attack Complexity:||Low|
|Privileges Required:||None||User Interaction:||Required|
|Integrity Impact:||None||Availability Impact:||None|
|Oracle Linux version 7 (thunderbird)||ELSA-2022-4891||2022-06-03|
|Oracle Linux version 8 (thunderbird)||ELSA-2022-4887||2022-06-06|
|Oracle Linux version 9 (thunderbird)||ELSA-2022-4892||2022-06-30|
This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team