Vulnerability identifier: #VU28800

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12803

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
LibreOffice
Client/Desktop applications / Office applications

Vendor: LibreOffice

Description

The vulnerability allows a remote attacker to overwrite arbitrary files on the system.

The vulnerability exists due to insufficient validation of user-supplied input when processing submittable forms in ODF documents. LibreOffice allows to submit data to forms, available via the file:// URI. A remote attacker can create a specially crafted form, trick the victim into submitting it and overwrite arbitrary files on the system with privileges of the current user.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

LibreOffice: 6.3.6.1 - 6.3.6.2, 6.3.5.1 - 6.3.5.2, 6.3.4.1 - 6.3.4.2, 6.3.0.0 - 6.3.0.4, 6.3.1 - 6.3.1.2, 6.3.2.1 - 6.3.2.2, 6.3.3.1 - 6.3.3.2

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External links
http://www.libreoffice.org/about-us/security/advisories/CVE-2020-12803

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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.