Ubuntu update for Firefox

Published: 2016-10-27

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2016-5287 CVE-2016-5288
CWE-ID	CWE-416
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Arbitrary code execution

EUVDB-ID: #VU1040

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-5287

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated user to execute arbitrary code on the target system.
The weakness is due to insufficient input validation. By tricking the victim to download a specially crafted content, attackers can trigger a use-after-free memory error in nsTArray_base::SwapArrayElements() and execute arbitrary code.
Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Mitigation

Update the affected packages

Ubuntu 16.10:

firefox 49.0.2+build2-0ubuntu0.16.10.2

Ubuntu 16.04 LTS:

firefox 49.0.2+build2-0ubuntu0.16.04.2

Ubuntu 14.04 LTS:

firefox 49.0.2+build2-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:

firefox 49.0.2+build2-0ubuntu0.12.04.1

Vulnerable software versions

Ubuntu: 12.04 - 16.10

CPE2.3

External links

https://www.ubuntu.com/usn/usn-3111-1/

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?

No. We are not aware of malware exploiting this vulnerability.

2) Information disclosure

EUVDB-ID: #VU1041

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-2016-5288