Bug 1745951 (CVE-2019-14973)

Summary:	CVE-2019-14973 libtiff: integer overflow in _TIFFCheckMalloc and _TIFFCheckRealloc in tif_aux.c
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhavsar, kyoshida, nforro, phracek
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:	2020-04-28 16:34:01 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:	1745952, 1755703, 1755704, 1755705
Bug Blocks:	1745954

Description Dhananjay Arunesh 2019-08-27 10:14:27 UTC

A vulnerability was found in _TIFFCheckMalloc and _TIFFCheckRealloc in tif_aux.c in LibTIFF through 4.0.10mishandle Integer Overflow checks because they rely on compiler behavior that is undefined by the applicable C standards. This can, for example, lead to an application crash.

Reference:
https://gitlab.com/libtiff/libtiff/merge_requests/90

Comment 1 Dhananjay Arunesh 2019-08-27 10:14:44 UTC

Created libtiff tracking bugs for this issue:

Affects: fedora-all [bug 1745952]

Comment 2 Huzaifa S. Sidhpurwala 2019-09-26 05:47:16 UTC

Analysis:

This is more of a hardening then a flaw. libtiff used an unsafe way to detect overflow in multiplication of signed types, which was implementation dependent. The issue is fixed by adding proper integer overflow checks.

Commit: https://gitlab.com/libtiff/libtiff/commit/2218055ca67d84be596a13080e8f50f22116555c

Comment 8 errata-xmlrpc 2020-04-28 15:40:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1688 https://access.redhat.com/errata/RHSA-2020:1688

Comment 9 Product Security DevOps Team 2020-04-28 16:34:01 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-14973

Comment 11 errata-xmlrpc 2020-09-29 19:41:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:3902 https://access.redhat.com/errata/RHSA-2020:3902