Arch Linux update for firefox

1) Security bypass

EUVDB-ID: #VU1831

Risk: Critical

CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2015-4495

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerabiity allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to improper input validation. A remote attacker can create a specially crafted PDF file, trick the victim into opening it, bypass same-origin policy and inject arbitrary JavaScript into the built-in PDF Viewer to gain access to arbitrary files on the 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.

Mitigation

Update the affected package to version 39.0.3-1.

Vulnerable software versions

Arch Linux: All versions

CPE2.3

• cpe:2.3:o:arch_linux:arch_linux:*:*:*:*:*:*:*:*

External links

https://www.mozilla.org/en-US/security/advisories/mfsa2015-78/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.