Bug 1524378

Summary:	libgxps: integer overflow when loading XPS documents containing specially crafted PNG files
Product:	[Other] Security Response	Reporter:	Stefan Cornelius <scorneli>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	mkasik, scorneli, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:33:01 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:	1591132, 1591133
Bug Blocks:	1487550

Description Stefan Cornelius 2017-12-11 11:44:13 UTC

An integer overflow flaw exists within the "gxps_images_create_from_png()" function in libgxps/gxps-images.c. An attacker can exploit this flaw to cause a heap-based buffer overflow by tricking a user into opening a specially crafted XPS document in an application using libgxps.

Comment 1 Stefan Cornelius 2017-12-12 09:17:14 UTC

Actually, it seesm like RHEL7 is not affected. We have a patch (libgxps-0.2.4-GXPSImage.patch), which appears to always cause a crash shortly before reaching the vulnerable code path.

Comment 2 Stefan Cornelius 2018-04-04 08:59:04 UTC

Upstream patch:
https://github.com/GNOME/libgxps/commit/123dd99c6a1ae2ef6fcb5547e51fa58e8c954b51

Something that may be worth backporting:
https://github.com/GNOME/libgxps/commit/672c65ea8cbd2bcfd82a6b6498a4f1eb9daf5ec5

Comment 3 Stefan Cornelius 2018-04-04 08:59:08 UTC

Acknowledgments:

Name: Stefan Cornelius (Red Hat)

Comment 5 Stefan Cornelius 2018-06-14 06:57:03 UTC

Created libgxps tracking bugs for this issue:

Affects: fedora-all [bug 1591132]