object-observe.js in Google V8, as used in Google Chrome before 45.0.2454.101, does not properly restrict method calls on access-checked objects, which allows remote attackers to bypass the Same Origin Policy via a (1) observe or (2) getNotifier call.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-1304
• https://chromium.googlesource.com/v8/v8/+/9b0fb52b57021473aa813f3fb99ad7384a8b86f1
• https://code.google.com/p/chromium/issues/detail?id=531891
• https://security.gentoo.org/glsa/201603-09
• http://googlechromereleases.blogspot.com/2015/09/stable-channel-update_24.html
• http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00008.html
• http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00002.html
• http://rhn.redhat.com/errata/RHSA-2015-1841.html
• http://www.debian.org/security/2015/dsa-3376
• http://www.securityfocus.com/bid/76844
• http://www.securitytracker.com/id/1033683
• http://www.ubuntu.com/usn/USN-2757-1