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CVE-2019-9854

Status Candidate

Overview

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 CVE-2019-9852, to avoid a directory traversal attack where scripts in arbitrary locations on the file system could be executed by employing a URL encoding attack to defeat the path verification step. However this protection could be bypassed by taking advantage of a flaw in how LibreOffice assembled the final script URL location directly from components of the passed in path as opposed to solely from the sanitized output of the path verification step. This issue affects: Document Foundation LibreOffice 6.2 versions prior to 6.2.7; 6.3 versions prior to 6.3.1.

Related Files

Red Hat Security Advisory 2020-1598-01
Posted Apr 28, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1598-01 - LibreOffice is an open source, community-developed office productivity suite. It includes key desktop applications, such as a word processor, a spreadsheet, a presentation manager, a formula editor, and a drawing program. LibreOffice replaces OpenOffice and provides a similar but enhanced and extended office suite. Issues addressed include a script execution vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2019-9849, CVE-2019-9850, CVE-2019-9851, CVE-2019-9852, CVE-2019-9853, CVE-2019-9854
SHA-256 | 755181ebd926d493153175d1e4d42bb9e1c8a5b1a42bf0d55491029ddcc901af
Red Hat Security Advisory 2020-1151-01
Posted Apr 1, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1151-01 - LibreOffice is an open source, community-developed office productivity suite. It includes key desktop applications, such as a word processor, a spreadsheet, a presentation manager, a formula editor, and a drawing program. LibreOffice replaces OpenOffice and provides a similar but enhanced and extended office suite. Issues addressed include code execution and script execution vulnerabilities.

tags | advisory, vulnerability, code execution
systems | linux, redhat
advisories | CVE-2019-9848, CVE-2019-9849, CVE-2019-9850, CVE-2019-9851, CVE-2019-9852, CVE-2019-9853, CVE-2019-9854
SHA-256 | 145184bdec8feb94e483fddfa0200c2069b777342feddd59c9da24d012ba93d3
Ubuntu Security Notice USN-4138-1
Posted Sep 24, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4138-1 - It was discovered that LibreOffice incorrectly handled embedded scripts in document files. If a user were tricked into opening a specially crafted document, a remote attacker could possibly execute arbitrary code.

tags | advisory, remote, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-9854
SHA-256 | 35de2613e4284f14f087555d52e861df76ee5b21c98f0c0d29c66caec5071819
Debian Security Advisory 4519-1
Posted Sep 10, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4519-1 - It was discovered that the code fixes for LibreOffice to address CVE-2019-9852 were not complete.

tags | advisory
systems | linux, debian
advisories | CVE-2019-9854
SHA-256 | 392ddf2c70b0f688d04fb1b89a78286a0799fcdc673200d04933e1ce2da8a869
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