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Bug 1092047 - Due to lack of CAP_DAC_OVERRIDE, pluto cannot write to directories not owned by root
Summary: Due to lack of CAP_DAC_OVERRIDE, pluto cannot write to directories not owned ...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: libreswan
Version: 7.1
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Paul Wouters
QA Contact: Aleš Mareček
URL:
Whiteboard:
Depends On: 1041576
Blocks: 1077162 1077582 1077594 1077606 1077611 1077618 1077670 1077672 1077673 1077676 1077677 1077681 1077683 1077686 1077690 1077691 1078918 1078919 1078920 1078921 1078923 1119723
TreeView+ depends on / blocked
 
Reported: 2014-04-28 15:15 UTC by Patrik Kis
Modified: 2015-03-05 10:22 UTC (History)
12 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of: 1041576
: 1119723 (view as bug list)
Environment:
Last Closed: 2015-03-05 10:22:02 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:0431 0 normal SHIPPED_LIVE libreswan bug fix and enhancement update 2015-03-05 14:52:35 UTC

Description Patrik Kis 2014-04-28 15:15:11 UTC 
This bug also exists on RHEL-7 with libreswan-3.8-4.el7 and it can be considered as regression against RHEL-6.

+++ This bug was initially created as a clone of Bug #1041576 +++

Description of problem:

The neutron-vpn-agent in OpenStack attempts to run:

ipsec pluto --ctlbase /var/lib/neutron/ipsec/be47e2c7-2ee1-4e77-bcfb-a21769de5118/var/run/pluto --ipsecdir /var/lib/neutron/ipsec/be47e2c7-2ee1-4e77-bcfb-a21769de5118/etc --use-netkey --uniqueids --nat_traversal --secretsfile /var/lib/neutron/ipsec/be47e2c7-2ee1-4e77-bcfb-a21769de5118/etc/ipsec.secrets --virtual_private %v4:172.24.4.224/28,%v4:10.0.0.2/

The /var/lib/neutron/... directories are all owned neutron:neutron 0755. Since pluto sets its capabilities in programs/pluto/plutomain.c without including CAP_DAC_OVERRIDE, it fails with:

pluto: unable to create lock dir: "/var/lib/neutron/ipsec/be47e2c7-2ee1-4e77-bcfb-a21769de5118/var/run/pluto": Permission denied


Version-Release number of selected component (if applicable):

openswan-2.6.32-27.el6.x86_64


How reproducible:
make a non-root-owned directory and pass it in as --ctlbase


Actual results:

pluto fails to run with the above error

Expected results:

pluto runs successfully

--- Additional comment from Terry Wilson on 2013-12-12 22:39:20 CET ---

I can verify that rebuilding openswan with the following patch:

--- programs/pluto/plutomain.c.old  2013-12-12 15:06:52.182664449 -0600
+++ programs/pluto/plutomain.c  2013-12-12 15:08:01.229676601 -0600
@@ -359,7 +359,7 @@
    capng_clear(CAPNG_SELECT_BOTH);
    capng_updatev(CAPNG_ADD, CAPNG_EFFECTIVE|CAPNG_PERMITTED,
            CAP_NET_BIND_SERVICE, CAP_NET_ADMIN, CAP_NET_RAW,
-           CAP_IPC_LOCK, -1);
+           CAP_IPC_LOCK, CAP_DAC_OVERRIDE, -1);
    /* our children must be able to CAP_NET_ADMIN to change routes.
     */
    capng_updatev(CAPNG_ADD, CAPNG_BOUNDING_SET,

does fix the problem for neutron-vpn-agent using openswan.
Comment 2 Avesh Agarwal 2014-04-28 15:50:05 UTC 
This bug is for 7.1 and openswan is not part of rhel7, so I am changing the component to libreswan.
Comment 3 Paul Wouters 2014-05-27 19:29:11 UTC 
any reason why this isnt scheduled for 7.0?
Comment 4 Patrik Kis 2014-05-28 07:32:58 UTC 
(In reply to Paul Wouters from comment #3)
> any reason why this isnt scheduled for 7.0?

RHEL-7.0 is already closed and no new fixes can be included so I requested the fix for 7.1. If you think the issue is critical enough, the fix can be delivered in 7.0.z or even as 0-day errata.
Comment 5 Terry Wilson 2014-06-03 17:01:21 UTC 
Patrik: This *absolutely* has to be in at least 7.0z. VPNaaS in RHOS5 depends on it.
Comment 18 errata-xmlrpc 2015-03-05 10:22:02 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-0431.html
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