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

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             AUSCERT External Security Bulletin Redistribution

                           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

Reference:         ESB-2018.2021

Original Bulletin:

- --------------------------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


Several security issues were fixed in CUPS.

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


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.

  CVE-2017-18248, CVE-2018-4180, CVE-2018-4181, CVE-2018-6553

Package Information:

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

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