Last Modified: Apr 28, 2023
Affected Product(s):
BIG-IP APM
Known Affected Versions:
15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2
Fixed In:
16.1.0
Opened: Jun 16, 2020 Severity: 3-Major
'Access-Control-Allow-Origin' header value may contain trailing white spaces in very rare cases, for example: Access-Control-Allow-Origin: http://example.com \r\n In this case, Cross-Origin Resource Sharing (CORS) validation may fail if the 'Origin' header value contains the same value as that of 'Access_Control_Allow_Origin', but without trailing white spaces, for example: Origin: http://example.com\r\n If CORS validation fails, content on the browser gets blocked.
Web application content gets blocked on the browser when accessed through Portal Access.
-- 'Origin' header and 'Access-Control-Allow-Origin' header values match except for the trailing white space. -- Using Portal Access to access the resource.
Use an iRule to truncate trailing white space from 'Access-Control-Allow-Origin' headers.
Now, content does not get blocked if 'Origin' header and 'Access-Control-Allow-Origin' header values match except for trailing white space.
