Bug 1559595 (CVE-2017-18235)

Summary:	CVE-2017-18235 exempi: assertion failure in VPXChunk class in XMPFiles/source/FormatSupport/WEBP_Support.cpp
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dakingun, jchaloup, nforro
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	exempi 2.4.3	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-05-04 09:57:54 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:	1559578, 1559603
Bug Blocks:	1559602

Description Laura Pardo 2018-03-22 20:31:10 UTC

An issue was discovered in Exempi before 2.4.3. The VPXChunk class in XMPFiles/source/FormatSupport/WEBP_Support.cpp does not ensure nonzero widths and heights, which allows remote attackers to cause a denial of service (assertion failure and application exit) via a crafted .webp file.

Reference:
https://bugs.freedesktop.org/show_bug.cgi?id=101913

Patch:
https://cgit.freedesktop.org/exempi/commit/?id=9e76a7782a54a242f18d609e7ba32bf1c430a5e4

Comment 1 Laura Pardo 2018-03-22 20:56:18 UTC

Created exempi tracking bugs for this issue:

Affects: fedora-all [bug 1559578]

Comment 3 Riccardo Schirone 2018-05-04 09:58:03 UTC

Statement:

This issue did not affect the versions of Exempi as shipped with Red Hat Enterprise Linux 6 and 7 as they did not include support for Web/P images.