Main Vulnerability Database Vulnerabilities #VU10444

Information disclosure in LibreOffice - CVE-2018-6871,CVE-2018-1055

Published: February 9, 2018 / Updated: June 17, 2021

Vulnerability identifier: #VU10444

CSH Severity: Low

CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-6871,CVE-2018-1055

CWE-ID: CWE-200

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists in LibreOffice Calc, which supports COM.MICROSOFT.WEBSERVICE function to obtain data by URL. The application allows WEBSERVICE to take a local file URL (e.g file://) which can be used to inject local files into the spreadsheet without warning the user. Subsequent formulas can operate on that inserted data and construct a remote URL. A remote attacker can create a specially crafted document, trick the victim into opening it and use WEBSERVICE functionality to send arbitrary local files to the attacker's controlled server.

Affected software

LibreOffice
Debian Linux
Gentoo Linux
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power
SUSE Linux
Ubuntu
Fedora
Opensuse
libreoffice (Alpine package)
libreoffice

How to mitigate CVE-2018-6871,CVE-2018-1055

Update to version 5.4.5.1 or 6.0.1.1.

libreoffice (Alpine package) - update to 5.4.5.1-r0
libreoffice - addressed in versions 5.3.7.2-8.fc26, 5.4.5.1-1.fc27

Links to Public Exploits and PoC-codes

Exploit #6318 - LibreOffice < 6.0.1 - '=WEBSERVICE' Remote Arbitrary File Disclosure (June 17, 2021)

External References

https://www.libreoffice.org/about-us/security/advisories/cve-2018-1055/