Mozilla Firefox before 36.0 does not properly restrict transitions of JavaScript objects from a non-extensible state to an extensible state, which allows remote attackers to bypass a Caja Compiler sandbox protection mechanism or a Secure EcmaScript sandbox protection mechanism via a crafted web site.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-0820
• https://bugzilla.mozilla.org/show_bug.cgi?id=1125389
• https://security.gentoo.org/glsa/201504-01
• http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00000.html
• http://lists.opensuse.org/opensuse-updates/2015-03/msg00067.html
• http://www.mozilla.org/security/announce/2015/mfsa2015-27.html
• http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
• http://www.securityfocus.com/bid/72757
• http://www.ubuntu.com/usn/USN-2505-1