Learn about CVE-2019-9852, a vulnerability in LibreOffice versions prior to 6.2.6 allowing bypassing of protection through a URL encoding attack. Find mitigation steps and prevention measures here.
LibreOffice offers a functionality that allows users to specify the execution of pre-installed macros on different script events like mouse-over or document-open. A vulnerability in versions older than 6.2.6 allows bypassing of a protection mechanism through a URL encoding attack.
Understanding CVE-2019-9852
This CVE identifies an insufficient URL encoding flaw in the allowed script location check in LibreOffice.
What is CVE-2019-9852?
CVE-2019-9852 is a vulnerability in LibreOffice versions prior to 6.2.6 that could be exploited to bypass a protection mechanism using a URL encoding attack.
The Impact of CVE-2019-9852
The vulnerability could allow an attacker to execute scripts in arbitrary locations on the file system, compromising the security of the system.
Technical Details of CVE-2019-9852
This section provides detailed technical information about the vulnerability.
Vulnerability Description
LibreOffice's protection against directory traversal attacks (CVE-2018-16858) could be bypassed using a URL encoding attack in versions older than 6.2.6.
Affected Systems and Versions
Exploitation Mechanism
The vulnerability allows attackers to execute scripts from unauthorized locations on the file system by exploiting the insufficient URL encoding in the script location check.
Mitigation and Prevention
Protect your systems from CVE-2019-9852 with the following steps:
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates
Ensure timely installation of security updates and patches provided by LibreOffice to address CVE-2019-9852.