Security bypass in Mozilla Firefox

1) Security bypass

EUVDB-ID: #VU622

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-5284

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote user to access potentially sensitive information on the target system.
The weakness exists due to ineffectiveness of certificate pinning for add-on updates. Such inefficiency allows a remote user with mis-issued certificate for a Mozilla web site to send malicious add-on updates to the network users.
Successful exploitation of the vulnerability may result in private information disclosure.

Mitigation

Update to 49.0.

Vulnerable software versions

Mozilla Firefox: 3.5 - 48.0.2

Oracle Linux: 10 - 11.3

Oracle Linux: 5 - 7

CPE2.3

• cpe:2.3:a:mozilla:mozilla_firefox:3.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:mozilla_firefox:44.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:mozilla_firefox:44.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:oracle_linux:10:*:*:*:*:*:*:*
• cpe:2.3::::11.3:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:oracle_linux:5:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:oracle_linux:6:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:oracle_linux:7:*:*:*:*:*:*:*

External links

https://www.mozilla.org/en-US/security/advisories/mfsa2016-85/
https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
https://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html

Q & A

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.