Bug 1443897 (CVE-2017-7976)

Summary:	CVE-2017-7976 jbig2dec: Integer overflow in the jbig2_image_compose_function
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abhgupta, deekej, kseifried, pzhukov, tiwillia, twaugh, zdohnal
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:	2017-07-20 14:08:59 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:	1443898, 1443899, 1443933, 1443934
Bug Blocks:	1443943

Description Andrej Nemec 2017-04-20 08:30:15 UTC

Artifex jbig2dec allows out-of-bounds writes and reads because of an integer overflow in the jbig2_image_compose function in jbig2_image.c during operations on a crafted .jb2 file, leading to a denial of service (application crash).

Upstream bug:

https://bugs.ghostscript.com/show_bug.cgi?id=697683

Comment 1 Andrej Nemec 2017-04-20 08:30:48 UTC

Created jbig2dec tracking bugs for this issue:

Affects: epel-all [bug 1443899]
Affects: fedora-all [bug 1443898]

Comment 2 Adam Mariš 2017-04-20 09:48:00 UTC

Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1443934]


Created mupdf tracking bugs for this issue:

Affects: fedora-all [bug 1443933]

Comment 3 Adam Mariš 2017-04-20 10:02:10 UTC

Acknowledgments:

Name: Dai Ge (Chinese Academy of Sciences)

Comment 4 Cedric Buissart 2017-07-20 14:04:31 UTC

CVE-2017-7976 is a regression caused by the upstream commit cecf6b (fixing CVE-2016-9601), in which signed int were changed to unsigned int.

As such, RHEL 5,6 & 7 are not affected.