oss-security - openvswitch world writable directories (CVE-2012-3449)

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Date: Thu, 02 Aug 2012 13:08:37 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: "oss-security@...ts.openwall.com" <oss-security@...ts.openwall.com>,
        debian@...ckmann.de
Subject: openvswitch world writable directories (CVE-2012-3449)

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Hash: SHA1

Andreas Beckmann debian@...ckmann.de reports:

openvswitch-pki creates the following world writable directories during
installation:

    drwx-wx-wx 2 root root 40 Aug  1 05:32
/var/lib/openvswitch/pki/controllerca/incoming
    drwx-wx-wx 2 root root 40 Aug  1 05:32
/var/lib/openvswitch/pki/switchca/incoming

Even if an ordinary local user cannot list the contents of the
directory, he may correctly derive/guess filenames (unless they are
exclusively $(mktemp)) and delete and replace files in there.

I don't know how openvswitch-pki works, how it uses this directory,
what probelms could possibly arise out of this.

References:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=683665


Please note on Fedora 16 and 17 run the command:

/usr/bin/ovs-pki --force init

to create the directories.

https://bugzilla.redhat.com/show_bug.cgi?id=845350

Please use CVE-2012-3449 for this issue.

- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

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