Opera 'HTTPS-Session' Multiple Vulnerabilities (Mac OS X)

Summary
The host is installed with Opera and is prone to multiple vulnerabilities.
Impact
Successful exploitation allows remote attackers to overwrite or delete arbitrary cookies via a Set-Cookie header in an HTTP response, which results into cross site scripting, cross site request forgery and denial of service attacks. Impact Level: Application
Solution
No solution or patch was made available for at least one year since disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer release, disable respective features, remove the product or replace the product by another one.
Insight
Multiple flaws are due to not properly restricting modifications to cookies established in HTTPS sessions.
Affected
Opera version 11.50 and prior.
References