Bug 1628040 (CVE-2018-16424)

Summary:	CVE-2018-16424 opensc: Double free handling responses from smartcards in tools/egk-tool.c:read_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:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gmazyland, jjelen, klember, nmavrogi, tmraz
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	opensc 0.19.0-rc1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-09-18 08:04:15 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:	1628041, 1628042
Bug Blocks:	1622787

Description Sam Fowler 2018-09-12 06:18:15 UTC

A double free when handling responses in read_file in tools/egk-tool.c (aka the eGK card tool) in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.


External References:

https://www.x41-dsec.de/lab/advisories/x41-2018-002-OpenSC/


Upstream Patch:

https://github.com/OpenSC/OpenSC/commit/360e95d45ac4123255a4c796db96337f332160ad#diff-476b3b2a03c4eef331b4b0bfece4b063

Comment 1 Sam Fowler 2018-09-12 06:18:46 UTC

Created opensc tracking bugs for this issue:

Affects: fedora-all [bug 1628041]

Comment 3 Doran Moppert 2018-09-18 07:51:23 UTC

The affected file does not exist in opensc-0.16.0, nor do its predecessors (read_file & related functions elsewhere) seem to realloc.