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Bug 1389193 - (CVE-2016-8626) CVE-2016-8626 Ceph: RGW Denial of Service by sending null or specially crafted POST object requests
CVE-2016-8626 Ceph: RGW Denial of Service by sending null or specially crafte...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
: ---
: ---
Assigned To: Red Hat Product Security
impact=moderate,public=20161020,repor...
: Security
Depends On: 1389199
Blocks: 1394936 1387332 1389198
  Show dependency tree / graph
 
Reported: 2016-10-27 03:25 EDT by Siddharth Sharma
Modified: 2016-12-01 17:38 EST (History)
23 users (show)

See Also:
Fixed In Version: RHEL: ceph-0.94.9-7.el7cp Ubuntu: ceph_0.94.9-8redhat1
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the way Ceph Object Gateway handles POST object requests. An authenticated attacker could launch a denial of service attack by sending null or specially crafted POST object requests.
Story Points: ---
Clone Of:
Environment:
Last Closed: 2016-12-01 17:38:59 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2815 normal SHIPPED_LIVE Moderate: Red Hat Ceph Storage security, bug fix, and enhancement update 2017-03-21 22:06:33 EDT
Red Hat Product Errata RHSA-2016:2816 normal SHIPPED_LIVE Moderate: Red Hat Ceph Storage security, bug fix, and enhancement update 2016-11-22 19:22:26 EST
Red Hat Product Errata RHSA-2016:2847 normal SHIPPED_LIVE Moderate: Red Hat Ceph Storage 1.3 security, bug fix, and enhancement update 2016-12-01 21:38:33 EST
Red Hat Product Errata RHSA-2016:2848 normal SHIPPED_LIVE Moderate: Red Hat Ceph Storage 1.3 security, bug fix, and enhancement update 2016-12-01 22:04:31 EST

  None (edit)
Description Siddharth Sharma 2016-10-27 03:25:06 EDT 
Description:

A Flaw was found using which authenticated attacker can send post object with null conditions to ceph rados gateway which would lead to crash of ceph-radosgw service resulting in Denial of Service.

http://tracker.ceph.com/issues/17635
https://bugzilla.redhat.com/show_bug.cgi?id=1387332
Comment 1 Siddharth Sharma 2016-10-27 03:26:22 EDT 
Workaround:

1. By default system will use /etc/init.d/ceph-radosgw
   stop this service by

~]# /etc/init.d/ceph-radosgw stop

2. Create systemd service, change command line params according to the environment
where Ceph radosgw is running.

~]# cat /usr/lib/systemd/system/ceph-rgw.service 
[Unit]
Description=Ceph RGW daemon

[Service]
Type=forking
ExecStart=/bin/radosgw -n client.rgw.$(HOSTNAME REDACTED)
Restart=on-abnormal
RestartSec=1s

[Install]
WantedBy=multi-user.target

3. Run systemd service 'ceph-rgw.service'

Caveat: It still takes +1-2 sec to get service back online. Attacker has to know bucket-name and for that attacker must be authenticated so if service get a lot of such requests user/attacker can be blocked by revoking access to service.
Comment 8 errata-xmlrpc 2016-11-22 14:24:12 EST 
This issue has been addressed in the following products:

 Red Hat Ceph Storage 2 for Ubuntu 16.04

Via RHSA-2016:2816 https://rhn.redhat.com/errata/RHSA-2016-2816.html
Comment 9 errata-xmlrpc 2016-11-22 14:33:11 EST 
This issue has been addressed in the following products:

  Red Hat Ceph Storage 2 for RHEL 7

Via RHSA-2016:2815 https://rhn.redhat.com/errata/RHSA-2016-2815.html
Comment 12 errata-xmlrpc 2016-12-01 16:39:14 EST 
This issue has been addressed in the following products:

  Red Hat Ceph Storage 1.3 for RHEL 7

Via RHSA-2016:2847 https://rhn.redhat.com/errata/RHSA-2016-2847.html
Comment 13 errata-xmlrpc 2016-12-01 17:04:40 EST 
This issue has been addressed in the following products:

  Red Hat Ceph Storage 1.3 for Ubuntu 14.04

Via RHSA-2016:2848 https://rhn.redhat.com/errata/RHSA-2016-2848.html
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