Characters from the Canadian Syllabics unicode block can be mixedwith characters from other unicode blocks in the addressbar instead of being rendered as their raw punycode form, allowing for domain name spoofing attacks through character confusion. The current Unicode standard allows characters from Aspirational Use Scripts such as Canadian Syllabics to be mixed with Latin characters in the moderately restrictive IDN profile. We have changed Firefox behavior to match the upcoming Unicode version 10.0 which removes this category and treats them as Limited Use Scripts. . This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.
NOTE: The following CVSS v2.0 metrics and score provided are preliminary and subject to review.
|Base Score:||5||Base Metrics:||AV:N/AC:L/Au:N/C:N/I:P/A:N|
|Access Vector:||Network||Attack Complexity:||Low|
|Authentication:||None required||Confidentiality Impact:||None|
|Integrity Impact:||Partial||Availability Impact:||None|
|Oracle Linux version 6 (firefox)||ELSA-2017-1440||2017-06-14|
|Oracle Linux version 6 (thunderbird)||ELSA-2017-1561||2017-06-21|
|Oracle Linux version 7 (firefox)||ELSA-2017-1440||2017-06-14|
|Oracle Linux version 7 (thunderbird)||ELSA-2017-1561||2017-06-21|
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