CVE-2019-9852

HIGH

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-2018-16858, 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. This issue affects: Document Foundation LibreOffice versions prior to 6.2.6.

References

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00006.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/PMEGUWMWORC3DOVEHVXLFT3A5RSCMLBH/

https://seclists.org/bugtraq/2019/Aug/28

https://seclists.org/bugtraq/2019/Sep/17

https://usn.ubuntu.com/4102-1/

https://www.debian.org/security/2019/dsa-4501

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

Details

Source: MITRE

Published: 2019-08-15

Updated: 2019-09-03

Type: CWE-22

Risk Information

CVSS v2.0

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3.0

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL