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Bug 1092047

Summary: Due to lack of CAP_DAC_OVERRIDE, pluto cannot write to directories not owned by root
Product: Red Hat Enterprise Linux 7 Reporter: Patrik Kis <pkis>
Component: libreswanAssignee: Paul Wouters <pwouters>
Status: CLOSED ERRATA QA Contact: Aleš Mareček <amarecek>
Severity: high Docs Contact:
Priority: high    
Version: 7.1CC: amarecek, ebenes, eparis, jkurik, kdube, nyechiel, pkis, pwouters, racedoro, sforsber, snagar, twilson
Target Milestone: rcKeywords: Regression, ZStream
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 1041576
: 1119723 (view as bug list) Environment:
Last Closed: 2015-03-05 10:22:02 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1041576    
Bug Blocks: 1077162, 1077582, 1077594, 1077606, 1077611, 1077618, 1077670, 1077672, 1077673, 1077676, 1077677, 1077681, 1077683, 1077686, 1077690, 1077691, 1078918, 1078919, 1078920, 1078921, 1078923, 1119723    

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