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Bug 1473198 - (CVE-2017-7541) CVE-2017-7541 kernel: Possible heap buffer overflow in brcmf_cfg80211_mgmt_tx()
CVE-2017-7541 kernel: Possible heap buffer overflow in brcmf_cfg80211_mgmt_tx()
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170717,repor...
: Security
Depends On: 1474785 1473199 1474778 1474779 1474780 1474781 1474782 1474783 1474784
Blocks: 1473200
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Reported: 2017-07-20 04:26 EDT by Adam Mariš
Modified: 2018-08-28 18:19 EDT (History)
40 users (show)

See Also:
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.
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:2863 normal SHIPPED_LIVE Moderate: kernel security and bug fix update 2017-10-05 20:51:54 EDT
Red Hat Product Errata RHSA-2017:2918 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-10-19 13:24:24 EDT
Red Hat Product Errata RHSA-2017:2930 normal SHIPPED_LIVE Important: kernel security and bug fix update 2017-10-19 14:47:35 EDT
Red Hat Product Errata RHSA-2017:2931 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-10-19 14:48:35 EDT

  None (edit)
Description Adam Mariš 2017-07-20 04:26:38 EDT 
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 04:27:30 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1473199]
Comment 4 Vladis Dronov 2017-07-24 09:59:46 EDT 
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 16:52:57 EDT 
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 09:26:19 EDT 
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 11:06:02 EDT 
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 11:09:37 EDT 
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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