Bug 1556708 (CVE-2018-7456)

Summary:	CVE-2018-7456 libtiff: NULL pointer dereference in tif_print.c:TIFFPrintDirectory() causes a denial of service
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	nforro, phracek, tgl
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:	2018-03-27 06:19:13 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:	1556709, 1556710, 1561318, 1561319
Bug Blocks:	1556712

Description Sam Fowler 2018-03-15 06:20:54 UTC

LibTIFF through version 4.0.9 is vulnerable to a NULL pointer dereference in tif_print.c:TIFFPrintDirectory(). An attacker exploit this to cause a denial of service using the tiffinfo command with a crafted TIFF image.

This is a different issue to CVE-2017-18013.


Upstream Bug:

http://bugzilla.maptools.org/show_bug.cgi?id=2778

Comment 1 Sam Fowler 2018-03-15 06:21:17 UTC

Created libtiff tracking bugs for this issue:

Affects: fedora-all [bug 1556709]

Comment 4 Huzaifa S. Sidhpurwala 2018-03-27 06:18:05 UTC

Analysis: 

Essentially a null pointer deref in the way tags are handled when printing them from a specially crafted TIFF file.

Comment 7 errata-xmlrpc 2019-08-06 12:08:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2051 https://access.redhat.com/errata/RHSA-2019:2051

Comment 8 errata-xmlrpc 2019-08-06 12:08:49 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2053 https://access.redhat.com/errata/RHSA-2019:2053