Bug 1556708 – CVE-2018-7456 libtiff: NULL pointer dereference in tif_print.c:TIFFPrintDirectory() causes a denial of service

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Bug 1556708 - (CVE-2018-7456) CVE-2018-7456 libtiff: NULL pointer dereference in tif_print.c:TIFFPrintDirectory() causes a denial of service

Summary:	CVE-2018-7456 libtiff: NULL pointer dereference in tif_print.c:TIFFPrintDirec...

Status:	CLOSED WONTFIX

Aliases:	CVE-2018-7456

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
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Target Release:	---
Assigned To:	Red Hat Product Security
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Whiteboard:	impact=low,public=20180224,reported=2...
Keywords:	Security

Depends On:	1561318 1561319 1556709 1556710
Blocks:	1556712
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Reported:	2018-03-15 02:20 EDT by Sam Fowler
Modified:	2018-03-28 01:43 EDT (History)
CC List:	3 users (show)

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Last Closed:	2018-03-27 02:19:13 EDT
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Description Sam Fowler 2018-03-15 02:20:54 EDT

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 02:21:17 EDT

Created libtiff tracking bugs for this issue:

Affects: fedora-all [bug 1556709]

Comment 4 Huzaifa S. Sidhpurwala 2018-03-27 02:18:05 EDT

Analysis: 

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

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