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Ubuntu Security Notice USN-4035-1
June 25, 2019

ceph vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 19.04
– Ubuntu 18.10
– Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Ceph.

Software Description:
– ceph: distributed storage and file system

Details:

It was discovered that Ceph incorrectly handled read only permissions. An
authenticated attacker could use this issue to obtain dm-crypt encryption
keys. This issue only affected Ubuntu 16.04 LTS. (CVE-2018-14662)

It was discovered that Ceph incorrectly handled certain OMAPs holding
bucket indices. An authenticated attacker could possibly use this issue to
cause a denial of service. This issue only affected Ubuntu 16.04 LTS.
(CVE-2018-16846)

It was discovered that Ceph incorrectly sanitized certain debug logs. A
local attacker could possibly use this issue to obtain encryption key
information. This issue was only addressed in Ubuntu 18.10 and Ubuntu
19.04. (CVE-2018-16889)

It was discovered that Ceph incorrectly handled certain civetweb requests.
A remote attacker could possibly use this issue to consume resources,
leading to a denial of service. This issue only affected Ubuntu 18.10 and
Ubuntu 19.04. (CVE-2019-3821)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 19.04:
ceph 13.2.4+dfsg1-0ubuntu2.1
ceph-common 13.2.4+dfsg1-0ubuntu2.1

Ubuntu 18.10:
ceph 13.2.4+dfsg1-0ubuntu0.18.10.2
ceph-common 13.2.4+dfsg1-0ubuntu0.18.10.2

Ubuntu 16.04 LTS:
ceph 10.2.11-0ubuntu0.16.04.2
ceph-common 10.2.11-0ubuntu0.16.04.2

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4035-1
CVE-2018-14662, CVE-2018-16846, CVE-2018-16889, CVE-2019-3821

Package Information:
https://launchpad.net/ubuntu/+source/ceph/13.2.4+dfsg1-0ubuntu2.1
https://launchpad.net/ubuntu/+source/ceph/13.2.4+dfsg1-0ubuntu0.18.10.2
https://launchpad.net/ubuntu/+source/ceph/10.2.11-0ubuntu0.16.04.2

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