Ubuntu update for LibreOffice

Published: 2017-05-02

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2016-10327 CVE-2017-7870
CWE-ID	CWE-122
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) Heap-based buffer overflow

EUVDB-ID: #VU6370

Risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-10327

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing EMF files with bitmap data preceded by a header and a field with in that header which states the offset from the start of the header to the bitmap data. A remote attacker cat embed a malicious EMF file into Office document, trick the victim into opening it, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected packages

Ubuntu 16.10:

libreoffice-core 1:5.2.2-0ubuntu2.1

Ubuntu 16.04 LTS:

libreoffice-core 1:5.1.6~rc2-0ubuntu1~xenial2

Ubuntu 14.04 LTS:

libreoffice-core 1:4.2.8-0ubuntu5.1

Vulnerable software versions

Ubuntu: 14.04 - 16.10

CPE2.3

External links

https://www.ubuntu.com/usn/usn-3273-1/

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) Heap-based buffer overflow

EUVDB-ID: #VU6371