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Bug 1350845 - (CVE-2016-1237) CVE-2016-1237 kernel: Missing check for permissions when setting ACL
CVE-2016-1237 kernel: Missing check for permissions when setting ACL
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20160624,repo...
: Security
Depends On: 1349645 1350847 1353091
Blocks: 1350850
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Reported: 2016-06-28 09:42 EDT by Adam Mariš
Modified: 2016-07-22 14:26 EDT (History)
37 users (show)

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Doc Text:
It was found that nfsd is missing permissions check when setting ACL on files, this may allow a local users to gain access to any file by setting a crafted ACL.
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Environment:
Last Closed: 2016-07-14 04:53:36 EDT
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Adam Mariš 2016-06-28 09:42:12 EDT 
It was found that nfsd is missing permissions check when setting ACL, which allows local users to gain access to any file by setting ACL.

Introduced in v3.14-rc1 by following commit:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4ac7249ea5a0ceef9f8269f63f33cc873c3fac61

Upstream fix:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=999653786df6954a31044528ac3f7a5dadca08f4

Prerequisite for the fix:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=485e71e8fb6356c08c7fc6bcce4bf02c9a9a663f


CVE request:

http://seclists.org/oss-sec/2016/q2/602
Comment 1 Adam Mariš 2016-06-28 09:44:22 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1350847]
Comment 2 Fedora Update System 2016-07-02 15:25:30 EDT 
kernel-4.5.7-202.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 4 Wade Mealing 2016-07-06 00:54:44 EDT 
Statement:

This issue does not affect any of Red Hat's shipping products.
Comment 7 Fedora Update System 2016-07-19 20:22:48 EDT 
kernel-4.6.4-301.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
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