This security advisory describes one critical risk vulnerability.
The vulnerabiity allows a remote attacker to bypass security restrictions on the target system.
Successful exploitation of this vulnerability may result in access to local files and privilege escalation, leading to system compromise.
Note: the vulnerability was being actively exploited.
Update Mozilla Firefox to version 39.0.3, Mozilla Firefox ESR to version 38.1, Mozilla Firefox OS to version 2.2.
Mozilla Firefox: 38.0, 38.0.1, 38.0.5, 39.0, 39.0.3, ESR 35.0, ESR 36.0, ESR 37.0, ESR 38.0, ESR 38.1, ESR 38.1.1, OS 1.0, OS 1.0.1, OS 1.1.0, OS 1.1.1, OS 1.2.0, OS 1.3.0, OS 1.4.0, OS 2.0, OS 2.1, OS 2.2CPE
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.