Bug 1744868 (CVE-2019-9852)

Summary:	CVE-2019-9852 libreoffice: Insufficient URL encoding flaw in allowed script location check
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	caolanm, dtardon, erack, sbergman
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	LibreOffice 6.2.6, LibreOffice 6.3.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-31 22:35:26 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1743958, 1743962, 1744869, 1812155, 1812162
Bug Blocks:	1744872

Description Dhananjay Arunesh 2019-08-23 04:37:01 UTC

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 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.

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

Comment 1 Dhananjay Arunesh 2019-08-23 04:37:15 UTC

Created libreoffice tracking bugs for this issue:

Affects: fedora-all [bug 1744869]

Comment 2 Dhananjay Arunesh 2019-08-23 04:37:33 UTC

External References:

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

Comment 3 Stefan Cornelius 2020-03-10 16:30:07 UTC

Patch:
https://cgit.freedesktop.org/libreoffice/core/commit/?id=315c51731384230194af26b86a976bf5d06c9dcc

Comment 6 errata-xmlrpc 2020-03-31 19:28:29 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1151 https://access.redhat.com/errata/RHSA-2020:1151

Comment 7 Product Security DevOps Team 2020-03-31 22:35:26 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-9852

Comment 8 errata-xmlrpc 2020-04-28 15:28:37 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1598 https://access.redhat.com/errata/RHSA-2020:1598