Bug 1473198 (CVE-2017-7541) - CVE-2017-7541 kernel: Possible heap buffer overflow in brcmf_cfg80211_mgmt_tx()
Summary: CVE-2017-7541 kernel: Possible heap buffer overflow in brcmf_cfg80211_mgmt_tx()
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-7541
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1473199 Engineering1474778 Engineering1474779 Engineering1474780 Engineering1474781 Engineering1474782 Engineering1474783 Engineering1474784 Engineering1474785
Blocks: Embargoed1473200
TreeView+ depends on / blocked
 
Reported: 2017-07-20 08:26 UTC by Adam Mariš
Modified: 2021-02-17 01:52 UTC (History)
39 users (show)

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.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:17:09 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:2863 0 normal SHIPPED_LIVE Moderate: kernel security and bug fix update 2017-10-06 00:51:54 UTC
Red Hat Product Errata RHSA-2017:2918 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-10-19 17:24:24 UTC
Red Hat Product Errata RHSA-2017:2930 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2017-10-19 18:47:35 UTC
Red Hat Product Errata RHSA-2017:2931 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-10-19 18:48:35 UTC

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
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