CVE-2019-9854 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.8 HIGH
Vector:  CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.html Third Party Advisory 
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00055.html Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=1769907 Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2019/10/msg00005.html Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XQKKOIY2DMZCXJINOLIQXD2NWISDKK3N/ Third Party Advisory 
https://seclists.org/bugtraq/2019/Sep/17 Mailing List  Third Party Advisory 
https://usn.ubuntu.com/4138-1/ Third Party Advisory 
https://www.debian.org/security/2019/dsa-4519 Third Party Advisory 
https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9854/ Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') cwe source acceptance level NIST  

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Change History

10 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-9854
NVD Published Date:
09/06/2019
NVD Last Modified:
08/24/2020
Source:
Document Foundation, The