Bug 1595575 (CVE-2018-12900)

Summary:	CVE-2018-12900 libtiff: Heap-based buffer overflow in the cpSeparateBufToContigBuf function resulting in a denial of service or possibly code execution
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:	erik-fedora, mike, 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:	2019-08-06 19:19:16 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:	1595576, 1595577, 1595578, 1595579, 1600430
Bug Blocks:	1595581

Description Andrej Nemec 2018-06-27 07:48:55 UTC

Heap-based buffer overflow in the cpSeparateBufToContigBuf function in tiffcp.c in LibTIFF 4.0.9 allows remote attackers to cause a denial of service (crash) or possibly have unspecified other impact via a crafted TIFF file.

Upstream issue:

http://bugzilla.maptools.org/show_bug.cgi?id=2798

Comment 1 Andrej Nemec 2018-06-27 07:49:30 UTC

Created libtiff tracking bugs for this issue:

Affects: fedora-all [bug 1595576]


Created mingw-libtiff tracking bugs for this issue:

Affects: epel-7 [bug 1595578]
Affects: fedora-all [bug 1595577]

Comment 3 Riccardo Schirone 2018-07-12 08:22:46 UTC

Raised CVSSv3 to 5.3/CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L because I do not exclude something more than a simple crash is possible with this flaw. Indeed you can overwrite many bytes after the limits of an heap-allocated buffer, thus code execution through heap manipulation is not excluded.

Comment 5 Riccardo Schirone 2018-07-12 08:42:43 UTC

The flaw is in the tiffcp binary and not in the libtiff library, thus programs that use libtiff are not affected.

Comment 7 Riccardo Schirone 2018-07-12 08:51:39 UTC

Patch is not available upstream yet.

Comment 8 errata-xmlrpc 2019-08-06 12:08:56 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

Comment 9 Product Security DevOps Team 2019-08-06 19:19:16 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-2018-12900

Comment 10 errata-xmlrpc 2019-11-05 20:48:24 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3419 https://access.redhat.com/errata/RHSA-2019:3419