Use-after-free error in LibreOffice

1) Use-after-free when parsing RTF files

EUVDB-ID: #VU64

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-2016-4324

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to improper handling of character style index within STL container in RTF files. A remote attacker can create a specially crafted RTF file, cause a use-after-free error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may allow an attacker to execute arbitrary code on the target system with privileges of the current user.

Mitigation

Install the latest version 5.1.4.

Vulnerable software versions

LibreOffice: 5.1.0 - 5.1.3

CPE2.3

• cpe:2.3:a:libreoffice:libreoffice:5.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:libreoffice:libreoffice:5.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:libreoffice:libreoffice:5.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:libreoffice:libreoffice:5.1.3:*:*:*:*:*:*:*

External links

https://www.libreoffice.org/about-us/security/advisories/cve-2016-4324/
https://blog.talosintel.com/2016/06/vulnerability-spotlight-libreoffice-rtf.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 or open a file.

Is there known malware, which exploits this vulnerability?

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