Bug 1473198 (CVE-2017-7541)

Summary:	CVE-2017-7541 kernel: Possible heap buffer overflow in brcmf_cfg80211_mgmt_tx()
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	apmukher, aquini, bhu, blc, dhoward, dominik.mierzejewski, fhrbata, gansalmon, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kent, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, madhu.chinakonda, matt, mchehab, mcressma, mlangsdo, nmurray, pholasek, plougher, rt-maint, rvrbovsk, sgruszka, slawomir, vdronov, williams, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	Kernel memory corruption due to a buffer overflow was found in brcmf_cfg80211_mgmt_tx() function in Linux kernels from v3.9-rc1 to v4.13-rc1. The vulnerability can be triggered by sending a crafted NL80211_CMD_FRAME packet via netlink. This flaw is unlikely to be triggered remotely as certain userspace code is needed for this. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although it is unlikely.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:17:09 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:	1473199, 1474778, 1474779, 1474780, 1474781, 1474782, 1474783, 1474784, 1474785
Bug Blocks:	1473200

Description Adam Mariš 2017-07-20 08:26:38 UTC

Kernel memory corruption due to a buffer overflow was found in brcmf_cfg80211_mgmt_tx() function in Linux kernels from v3.9-rc1 to v4.13-rc1. It can be triggered by sending crafted NL80211_CMD_FRAME packet via netlink.

This flaw is unlikely to be triggered remotely, as certain userspace code is needed for this. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.

References:

http://seclists.org/oss-sec/2017/q3/208

https://bugzilla.novell.com/show_bug.cgi?id=1049645

https://www.spinics.net/lists/stable/msg180994.html

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8f44c9a41386729fea410e688959ddaa9d51be7c

Comment 1 Adam Mariš 2017-07-20 08:27:30 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1473199]

Comment 4 Vladis Dronov 2017-07-24 13:59:46 UTC

Statement:

This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5 as the code with the flaw is not present in the products listed.

This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2. Future kernel updates for these products may address this issue.

Comment 6 errata-xmlrpc 2017-10-05 20:52:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:2863 https://access.redhat.com/errata/RHSA-2017:2863

Comment 7 errata-xmlrpc 2017-10-19 13:26:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:2918 https://access.redhat.com/errata/RHSA-2017:2918

Comment 8 errata-xmlrpc 2017-10-19 15:06:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2930 https://access.redhat.com/errata/RHSA-2017:2930

Comment 9 errata-xmlrpc 2017-10-19 15:09:37 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2931 https://access.redhat.com/errata/RHSA-2017:2931