Bug 1663072 (CVE-2018-20511)

Summary:	CVE-2018-20511 kernel: Memory address exposure in drivers/net/appletalk/ipddp.c:ipddp_ioctl() by users with CAP_NET_ADMIN
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:	abhgupta, acaringi, bhu, blc, brdeoliv, dbaker, dhoward, dvlasenk, esammons, fhrbata, hkrzesin, hwkernel-mgr, iboverma, jkacur, jokerman, jross, jstancek, kernel-mgr, lgoncalv, matt, mcressma, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, sthangav, trankin, williams, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.18.11	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-01-15 11:06:22 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:
Bug Blocks:	1663075

Description Sam Fowler 2019-01-03 03:14:21 UTC

An issue was discovered in the Linux kernel before 4.18.11. The ipddp_ioctl function in drivers/net/appletalk/ipddp.c allows local users to obtain sensitive kernel address information by leveraging CAP_NET_ADMIN to read the ipddp_route dev and next fields via an SIOCFINDIPDDPRT ioctl call.


Upstream Patch:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9824dfae
https://github.com/torvalds/linux/commit/9824dfae
https://lkml.org/lkml/2018/9/27/480