high
7.8
CWE
22 116
Advisory Published
Updated

CVE-2019-9852: Insufficient URL encoding flaw in allowed script location check

First published: Thu Aug 15 2019(Updated: )

A vulnerability was found in LibreOffice prior to 6.2.6. LibreOffice has a feature where documents can specify that pre-installed macros can be executed on various script events such as mouse-over, document-open etc. Access is intended to be restricted to scripts under the share/Scripts/python, user/Scripts/python sub-directories of the LibreOffice install. Protection was added, to address <a href="https://access.redhat.com/security/cve/CVE-2018-16858">CVE-2018-16858</a>, to avoid a directory traversal attack where scripts in arbitrary locations on the file system could be executed. However this new protection could be bypassed by a URL encoding attack. In the fixed versions, the parsed url describing the script location is correctly encoded before further processing. Reference: <a href="https://seclists.org/bugtraq/2019/Aug/28">https://seclists.org/bugtraq/2019/Aug/28</a>

Credit: security@documentfoundation.org security@documentfoundation.org

Affected SoftwareAffected VersionHow to fix
redhat/LibreOffice<6.2.6
6.2.6
redhat/LibreOffice<6.3.0
6.3.0
debian/libreoffice
1:7.0.4-4+deb11u10
1:7.0.4-4+deb11u11
4:7.4.7-1+deb12u4
4:7.4.7-1+deb12u5
4:24.8.2-1
4:24.8.2-2
Ubuntu Linux=16.04
Ubuntu Linux=18.04
Ubuntu Linux=19.04
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Fedoraproject Fedora=29
openSUSE=15.0
openSUSE=15.1
The Document Foundation LibreOffice<6.2.6

Remedy

https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9852

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Reference Links

Frequently Asked Questions

  • What is CVE-2019-9852?

    CVE-2019-9852 is a vulnerability in LibreOffice that allows documents to execute pre-installed macros on various script events, which can lead to unauthorized execution of potentially malicious code.

  • How severe is CVE-2019-9852?

    CVE-2019-9852 has a severity rating of 7.8, which is considered high.

  • What software is affected by CVE-2019-9852?

    LibreOffice versions 6.0.7-0ubuntu0.18.04.9, 6.2.6-0ubuntu0.19.04.1, 6.3.0-1, 5.1.6~, 6.2.6, and 6.3.0 are affected by CVE-2019-9852.

  • How can I fix CVE-2019-9852?

    To fix CVE-2019-9852, update LibreOffice to versions 6.0.7-0ubuntu0.18.04.9, 6.2.6-0ubuntu0.19.04.1, 6.3.0-1, 5.1.6~, 6.2.6, or 6.3.0 or apply the necessary patches provided by your operating system or software vendor.

  • Where can I find more information about CVE-2019-9852?

    You can find more information about CVE-2019-9852 at the following references: [link1], [link2], [link3].

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