National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 9.8 CRITICAL
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (V3.0 legend)
Impact Score: 5.9
Exploitability Score: 3.9


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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

Technical Details

Vulnerability Type (View All)

  • Improper Access Control (CWE-284)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
6.2.0
Up to (excluding)
6.2.7
 cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
6.3.0
Up to (excluding)
6.3.1


Change History

8 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-9854
NVD Published Date:
09/06/2019
NVD Last Modified:
09/09/2019