ESB-2018.2025 - [Ubuntu] cups: Multiple vulnerabilities 2018-07-12

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2025
                           CUPS vulnerabilities
                               12 July 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           cups
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Root Compromise                 -- Existing Account            
                   Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Access Privileged Data          -- Existing Account            
                   Unauthorised Access             -- Remote/Unauthenticated      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-6553 CVE-2018-4181 CVE-2018-4180
                   CVE-2017-18248  

Reference:         ESB-2018.2021

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3713-1

- --------------------------BEGIN INCLUDED TEXT--------------------

==========================================================================
Ubuntu Security Notice USN-3713-1
July 11, 2018

cups vulnerabilities
==========================================================================

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

- - Ubuntu 18.04 LTS
- - Ubuntu 17.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in CUPS.

Software Description:
- - cups: Common UNIX Printing System(tm)

Details:

It was discovered that CUPS incorrectly handled certain print jobs with
invalid usernames. A remote attacker could possibly use this issue to cause
CUPS to crash, resulting in a denial of service. This issue only affected
Ubuntu 14.04 LTS, Ubuntu 17.10 and Ubuntu 18.04 LTS. (CVE-2017-18248)

Dan Bastone discovered that the CUPS dnssd backend incorrectly handled
certain environment variables. A local attacker could possibly use this
issue to escalate privileges. (CVE-2018-4180)

Eric Rafaloff and John Dunlap discovered that CUPS incorrectly handled
certain include directives. A local attacker could possibly use this issue
to read arbitrary files. (CVE-2018-4181)

Dan Bastone discovered that the CUPS AppArmor profile incorrectly confined
the dnssd backend. A local attacker could possibly use this issue to escape
confinement. (CVE-2018-6553)

Update instructions:

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

Ubuntu 18.04 LTS:
  cups                            2.2.7-1ubuntu2.1

Ubuntu 17.10:
  cups                            2.2.4-7ubuntu3.1

Ubuntu 16.04 LTS:
  cups                            2.1.3-4ubuntu0.5

Ubuntu 14.04 LTS:
  cups                            1.7.2-0ubuntu1.10

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

References:
  https://usn.ubuntu.com/usn/usn-3713-1
  CVE-2017-18248, CVE-2018-4180, CVE-2018-4181, CVE-2018-6553

Package Information:
  https://launchpad.net/ubuntu/+source/cups/2.2.7-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/cups/2.2.4-7ubuntu3.1
  https://launchpad.net/ubuntu/+source/cups/2.1.3-4ubuntu0.5
  https://launchpad.net/ubuntu/+source/cups/1.7.2-0ubuntu1.10

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=dlPU
-----END PGP SIGNATURE-----

« Back to bulletins