Bug 1325093 (CVE-2016-3945)

Summary:	CVE-2016-3945 libtiff: out-of-bounds write in the tiff2rgba tool
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	carnil, erik-fedora, even.rouault, phracek, sardella, slawomir
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-08-24 08:35:04 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:	1299920, 1299921, 1335098, 1335099
Bug Blocks:	1316881

Description Andrej Nemec 2016-04-08 08:24:48 UTC

Out-of-bounds write vulnerability was found in cvt_by_strip and cvt_by_tile functions in tiff2rgba, allowing attacker to cause a denial of service or command execution via a crafted TIFF image.

Public via:

http://seclists.org/oss-sec/2016/q2/30

Upstream bug:

http://bugzilla.maptools.org/show_bug.cgi?id=2545

Comment 6 errata-xmlrpc 2016-08-02 16:41:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:1547 https://rhn.redhat.com/errata/RHSA-2016-1547.html

Comment 7 errata-xmlrpc 2016-08-02 17:01:07 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:1546 https://rhn.redhat.com/errata/RHSA-2016-1546.html

Comment 8 Even Rouault 2016-08-04 09:29:57 UTC

It would have been good to attach your patch to the upstream bug instead of letting libtiff maintainers to dig into the .src.rpm

Comment 9 Even Rouault 2016-08-15 20:12:32 UTC

Patch tiff-CVE-2016-3945.patch from libtiff-4.0.3-25.el7_2.src.rpm is incorrect. It rejects valid files. Fixed in libtiff upstream per :

Fixed per:

2016-08-15 Even Rouault <even.rouault at spatialys.com>

* tools/tiff2rgba.c: Fix integer overflow in size of allocated
buffer, when -b mode is enabled, that could result in out-of-bounds
write. Based initially on patch tiff-CVE-2016-3945.patch from
libtiff-4.0.3-25.el7_2.src.rpm by Nikola Forro, with correction for
invalid tests that rejected valid files.

/cvs/maptools/cvsroot/libtiff/tools/tiff2rgba.c,v  <--  tools/tiff2rgba.c
new revision: 1.22; previous revision: 1.21

See http://bugzilla.maptools.org/show_bug.cgi?id=2545