Bug 1737427 (CVE-2019-9848)

Summary:	CVE-2019-9848 libreoffice: LibreLogo script can be manipulated into executing arbitrary python commands
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	apmukher, caolanm, dtardon, erack, sbergman
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libreoffice 6.2.5	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-31 22:35:20 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:	1737428, 1743962
Bug Blocks:	1737430

Description Marian Rehak 2019-08-05 11:05:47 UTC

LibreLogo, a programmable turtle vector graphics script, which can be manipulated into executing arbitrary python commands. By using the document event feature to trigger LibreLogo to execute python contained within a document a malicious document could be constructed which would execute arbitrary python commands silently without warning. This issue affects: Document Foundation LibreOffice versions prior to 6.2.5.

External References:

https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9848

Comment 1 Marian Rehak 2019-08-05 11:05:57 UTC

Created libreoffice tracking bugs for this issue:

Affects: fedora-all [bug 1737428]

Comment 2 Huzaifa S. Sidhpurwala 2019-08-21 05:10:26 UTC

Analysis:

Basically a flaw in librelogo which is a "a programmable turtle vector graphics script" shipped with libreoffice. Document events like mouse click etc can be used to trigger user inserted librelogo scripts. A malicious document could be constructed which would execute arbitrary python commands silently without warning.

The patch basically disallows librelogo scripts to be called from document event handler.

Comment 4 errata-xmlrpc 2020-03-31 19:28:22 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 5 Product Security DevOps Team 2020-03-31 22:35:20 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-2019-9848