Bug 1720011 (CVE-2019-11706)

Summary:	CVE-2019-11706 libical: Type confusion in icaltimezone_get_vtimezone_properties function in icalproperty.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	cschalle, debarshir, gecko-bugs-nobody, gecko-bugs-nobody, jhorak, john.j5live, kengert, mcrha, mrehak, pjasicek, rdieter, rhughes, rstrode, sandmann, security-response-team, stransky
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Thunderbird 60.7.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-07-12 13:07:39 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:	1720053, 1720054, 1720055, 1720056, 1720057, 1720424
Bug Blocks:	1720012

Description Pedro Sampaio 2019-06-12 22:29:37 UTC

A flaw was found in Mozilla Thunderbird. A type confusion in icaltimezone_get_vtimezone_properties in icalproperty.c might lead to process crash and potentially others consequences.

References:

https://bugzilla.mozilla.org/show_bug.cgi?id=1555646

Comment 6 Milan Crha 2019-06-13 08:38:18 UTC

Is this for Thunderbird only, or the libical package is also affected? I would verify that myself, but I do not have access to any related bug report mentioned here, neither to the upstream Mozilla bug.

Comment 7 Doran Moppert 2019-06-14 00:47:00 UTC

External References:

https://www.mozilla.org/en-US/security/advisories/mfsa2019-17/

Comment 8 Doran Moppert 2019-06-14 00:47:02 UTC

Mitigation:

Thunderbird can be configured to use icaljs instead of libical by setting `calendar.icaljs = true` in preferences, mitigating this vulnerability.

Comment 9 Doran Moppert 2019-06-14 00:52:26 UTC

Created thunderbird tracking bugs for this issue:

Affects: fedora-all [bug 1720424]

Comment 10 Marian Rehak 2019-06-14 11:53:19 UTC

References:

https://www.openwall.com/lists/oss-security/2019/06/13/4

Comment 11 Doran Moppert 2019-06-27 03:43:49 UTC

The type confusion described in this bug doesn't seem to be possible upstream for a very long time:  at least since 0.43, properties have had a type tag which is checked before returning a value that could be misinterpreted.  That type tag is not present in the Thunderbird downstream fork, so confusion is possible.

Comment 12 errata-xmlrpc 2019-06-27 09:18:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:1623 https://access.redhat.com/errata/RHSA-2019:1623

Comment 13 errata-xmlrpc 2019-06-27 10:12:30 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2019:1624 https://access.redhat.com/errata/RHSA-2019:1624

Comment 14 errata-xmlrpc 2019-06-27 10:15:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:1626 https://access.redhat.com/errata/RHSA-2019:1626

Comment 15 Product Security DevOps Team 2019-07-12 13:07:39 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-2019-11706