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 v4.0: 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/E:P/U:Clear
CVE-ID: CVE-2018-6871,CVE-2018-1055
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: LibreOffice
Affected software:
LibreOffice
LibreOffice
Detailed vulnerability description
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.
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.
How to mitigate CVE-2018-6871,CVE-2018-1055
Update to version 5.4.5.1 or 6.0.1.1.