Bug 1764742 (CVE-2019-18281)

Summary:	CVE-2019-18281 qt5-qtbase: Out-of-bounds access in generateDirectionalRuns() function in qtextengine.cpp
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	erik-fedora, jgrulich, jreznik, kde-sig, manisandro, rdieter, than
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	qt5-qtbase v-5.12.5	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-25 22:12:37 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:	1764743, 1764744, 1764745, 1764746, 1790901
Bug Blocks:	1764747

Description Pedro Sampaio 2019-10-23 17:17:50 UTC

An out-of-bounds memory access in the generateDirectionalRuns() function in qtextengine.cpp in Qt qtbase 5.11.x and 5.12.x before 5.12.5 allows attackers to cause a denial of service by crashing an application via a text file containing many directional characters.

Upstream patch:

https://codereview.qt-project.org/c/qt/qtbase/+/271889

Comment 1 Pedro Sampaio 2019-10-23 17:18:21 UTC

Created mingw-qt5-qtbase tracking bugs for this issue:

Affects: epel-7 [bug 1764746]
Affects: fedora-all [bug 1764745]


Created qt5-qtbase tracking bugs for this issue:

Affects: epel-6 [bug 1764744]
Affects: fedora-all [bug 1764743]

Comment 2 Marco Benatto 2020-01-14 13:57:41 UTC

Statement:

Red Hat Enterprise Linux 7 is not affected by this issue as qt5-base version as shipped with it doesn't have the code which contains the bug.