Information disclosure in Mozilla Firefox

1) Information disclosure

EUVDB-ID: #VU618

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-5271

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote user to obtain potentially sensitive information on the target system.
The weakness is caused by using of display:contents during text processing. An out-of-bounds read error in PropertyProvider::GetSpacingInternal() allows attackers to view important user's data.
Successful exploitation of the vulnerability results in access to potentially sensitive data on the vulnerable system.

Mitigation

Update to 49.0.

Vulnerable software versions

Mozilla Firefox: 3.5 - 48.0.2

External links

http://www.mozilla.org/en-US/security/advisories/mfsa2016-85/

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.