Bug 1447734 (CVE-2017-7487)

Summary:	CVE-2017-7487 kernel: Reference counter leak in ipxitf_ioctl resulting into use after free
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	agordeev, aquini, bhu, dhoward, esammons, fhrbata, iboverma, jkacur, jross, lgoncalv, lwang, matt, mcressma, mguzik, nmurray, pholasek, plougher, rvrbovsk, security-response-team, vdronov, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	A reference counter leak in Linux kernel in ipxitf_ioctl function was found which results in a use after free vulnerability that's triggerable from unprivileged userspace when IPX interface is configured.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-05-12 13:28:36 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:	1450417
Bug Blocks:	1447735

Description Adam Mariš 2017-05-03 15:33:43 UTC

A reference counter leak in ipxitf_ioctl function was found which results into use after free vulnerability that's triggerable from unprivileged userspace when IPX interface is configured.

References:

http://seclists.org/oss-sec/2017/q2/251

https://patchwork.ozlabs.org/patch/757549/

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee0d8d8482345ff97a75a7d747efc309f13b0d80

Comment 1 Adam Mariš 2017-05-03 15:33:55 UTC

Acknowledgments:

Name: Li Qiang (Qihoo 360)

Comment 4 Vladis Dronov 2017-05-12 13:20:25 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1450417]

Comment 6 Eric Christensen 2017-05-16 12:29:42 UTC

Statement:

This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2 as the code with the flaw is not shipped with the products listed.