Bug 1555164 (CVE-2018-7731)

Summary:	CVE-2018-7731 exempi: NULL pointer dereference in XMPFiles/source/FormatSupport/WEBP_Support.cpp:WEBP::VP8XChunk allows for denial of service via crafted file
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
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 2.4.5	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-04-27 13:10:19 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:	1555156, 1555169
Bug Blocks:	1555158

Description Sam Fowler 2018-03-14 04:49:57 UTC

Exempi through version 2.4.4 is vulnerable to a NULL pointer dereference in the XMPFiles/source/FormatSupport/WEBP_Support.cpp:WEBP::VP8XChunk class. An attacker could exploit this to cause a denial of service via crafted file.


Upstream Bug Report:

https://bugs.freedesktop.org/show_bug.cgi?id=105247


Upstream Patch:

https://cgit.freedesktop.org/exempi/commit/?id=aabedb5e749dd59112a3fe1e8e08f2d934f56666

Comment 2 Sam Fowler 2018-03-14 05:18:39 UTC

Created exempi tracking bugs for this issue:

Affects: fedora-all [bug 1555156]

Comment 4 Riccardo Schirone 2018-04-27 13:10:28 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 WebP file format.