Input validation error in LibreOffice - CVE-2020-12803

Vulnerability identifier: #VU28800

CSH Severity: Medium

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-12803

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

LibreOffice
libreoffice (Red Hat package)
libcmis (Red Hat package)
liborcus (Red Hat package)
libreoffice (Ubuntu package)
libreoffice
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Opensuse
Ubuntu
Fedora

Install updates from vendor's website.

LibreOffice - update to 6.4.4.1
libreoffice (Red Hat package) - update to 6.3.6.2-3.el8
libcmis (Red Hat package) - update to 0.5.2-1.el8
liborcus (Red Hat package) - update to 0.14.1-1.el8
libreoffice (Ubuntu package) - addressed in versions 1:6.0.7-0ubuntu0.18.04.12, 1:6.4.7-0ubuntu0.20.04.6, 1:7.3.6-0ubuntu0.22.04.2
libreoffice - update to 6.3.6.2-4.fc31

• https://www.libreoffice.org/about-us/security/advisories/CVE-2020-12803

• Multiple vulnerabilities in LibreOffice
• OpenSUSE Linux update for libreoffice
• OpenSUSE Linux update for libreoffice
• Red Hat update for libreoffice
• Ubuntu update for libreoffice
• Fedora 31 update for libreoffice