Bug 1350845 (CVE-2016-1237) - CVE-2016-1237 kernel: Missing check for permissions when setting ACL
Summary: CVE-2016-1237 kernel: Missing check for permissions when setting ACL
Status: CLOSED NOTABUG
Alias: CVE-2016-1237
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=important,public=20160624,repo...
Keywords: Security
Depends On: 1349645 1350847 1353091
Blocks: 1350850
TreeView+ depends on / blocked
 
Reported: 2016-06-28 13:42 UTC by Adam Mariš
Modified: 2019-06-08 21:18 UTC (History)
37 users (show)

(edit)
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.
Clone Of:
(edit)
Last Closed: 2016-07-14 08:53:36 UTC


Attachments (Terms of Use)

Description Adam Mariš 2016-06-28 13:42:12 UTC
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 13:44:22 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1350847]

Comment 2 Fedora Update System 2016-07-02 19:25:30 UTC
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 04:54:44 UTC
Statement:

This issue does not affect any of Red Hat's shipping products.

Comment 7 Fedora Update System 2016-07-20 00:22:48 UTC
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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