Bug 1645140 (CVE-2018-18710)

Summary:	CVE-2018-18710 kernel: Information leak in cdrom_ioctl_select_disc in drivers/cdrom/cdrom.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abhgupta, acaringi, airlied, bhu, blc, brdeoliv, bskeggs, dbaker, dhoward, dvlasenk, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jokerman, jonathan, josef, jross, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, steved, sthangav, trankin, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	An issue was discovered in the Linux kernel through 4.19. An information leak in cdrom_ioctl_select_disc in drivers/cdrom/cdrom.c could be used by local attackers to read kernel memory because a cast from unsigned long to int interferes with bounds checking.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-30 16:31:46 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:	1645141, 1648485, 1650476
Bug Blocks:	1645142

Description Pedro Sampaio 2018-11-01 13:32:54 UTC

An issue was discovered in the Linux kernel through 4.19. An information leak in cdrom_ioctl_select_disc in drivers/cdrom/cdrom.c could be used by local attackers to read kernel memory because a cast from unsigned long to int interferes with bounds checking. This is similar to CVE-2018-10940 and CVE-2018-16658.

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4f3aa2e1e67bb48dfbaaf1cad59013d5a5bc276
https://github.com/torvalds/linux/commit/e4f3aa2e1e67bb48dfbaaf1cad59013d5a5bc276

Comment 2 Laura Pardo 2018-11-09 21:15:40 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1648485]

Comment 5 Product Security DevOps Team 2020-04-30 16:31:46 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-2018-18710