Security restrictions bypass in libreoffice (Alpine package)

1) Security restrictions bypass

EUVDB-ID: #VU19225

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-9849

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to incorrect implementation of stealth mode feature, intended as an additional level of security that allows to retrieve online content into document from trusted resources only. A remote attacker can create a specially crafted document with bullet graphics, bypass the intended security restrictions and make the application retrieve data from arbitrary external sources.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libreoffice (Alpine package): 6.2.4.2-r0 - 6.2.7.1-r0

External links

http://git.alpinelinux.org/aports/commit/?id=21f16e773dfa5bdb7de40ef44927cb37ca05d6c3
http://git.alpinelinux.org/aports/commit/?id=e1bb2fed23c4ced50e06b6fb6f9f9a03f628fc72
http://git.alpinelinux.org/aports/commit/?id=b0081284ea36cbfdef2b4d3de343f33e450192b4

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.