Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Wed, 23 Dec 2015 16:46:03 -0500 (EST)
From: cve-assign@...re.org
To: vdronov@...hat.com
Cc: cve-assign@...re.org, oss-security@...ts.openwall.com
Subject: Re: CVE request -- linux kernel: overlay: fix permission checking for setattr

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

> A flaw was found in the overlay filesystem of the Linux kernel which allows
> an unprivileged user to change attributes of the files in the overlay,
> particularly allowing access to root-only-accessible files like '/etc/shadow'.

> https://bugzilla.redhat.com/show_bug.cgi?id=1291329

>> A security issue was fixed in kernel 4.4-rc4 resolving the bypassing
>> of filesystem permission checks in overlayfs during the initial
>> copy_up.

> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=acff81ec2c79492b180fade3c2894425cd35a545

>> Having these two ->setattr() (one to set verbatim copy of metadata,
>> another to do what overlayfs ->setattr() had been asked to do in the
>> first place) combined is where it breaks.

Use CVE-2015-8660.

- -- 
CVE assignment team, MITRE CVE Numbering Authority
M/S M300
202 Burlington Road, Bedford, MA 01730 USA
[ PGP key available through http://cve.mitre.org/cve/request_id.html ]
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=OtE0
-----END PGP SIGNATURE-----

Powered by blists - more mailing lists

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.