Bug 1530440 (CVE-2017-18013)

Summary:	CVE-2017-18013 libtiff: NULL pointer dereference in tif_print.c:TIFFPrintDirectory() causes crash
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	nforro, phracek, tgl
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libtiff 4.0.9-3	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-01-08 05:42:09 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:	1530441
Bug Blocks:	1530443

Description Sam Fowler 2018-01-03 04:01:56 UTC

LibTIFF 4.0.9 is vulnerable to a crash caused by a NULL pointer dereference in the TIFFPrintDirectory function in tif_print.c. An attacker could exploit this by supplying a specially crafted TIFF image, leading to a denial of service.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-18013
http://www.cvedetails.com/cve/CVE-2017-18013/
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18013
https://gitlab.com/libtiff/libtiff/commit/c6f41df7b581402dfba3c19a1e3df4454c551a01
http://bugzilla.maptools.org/show_bug.cgi?id=2770

Comment 1 Sam Fowler 2018-01-03 04:03:12 UTC

Created libtiff tracking bugs for this issue:

Affects: fedora-all [bug 1530441]

Comment 2 Huzaifa S. Sidhpurwala 2018-01-08 05:41:27 UTC

It seems this flaw is triggered by the following changeset:
https://gitlab.com/libtiff/libtiff/commit/7057734d986001b7fd6d2afde9667da7754ff2cc

This was introduced in tiff-4.0.9, therefore older versions are not affected.