Ubuntu Security Notice USN-6267-1

Ubuntu Security Notice 6267-1 - Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across domains, or execute arbitrary code. Max Vlasov discovered that Firefox Offscreen Canvas did not properly track cross-origin tainting. An attacker could potentially exploit this issue to access image data from another site in violation of same-origin policy.

canvas code cross-origin denial of service domains exploit firefox information notice origin security security issues security notice sensitive information service track ubuntu usn website