ESB-2018.2021 - ALERT [UNIX/Linux][Debian] cups: Multiple vulnerabilities 2018-07-12

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2021
                           cups security update
                               12 July 2018

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

Product:           cups
Publisher:         Debian
Operating System:  Debian GNU/Linux 9
                   UNIX variants (UNIX, Linux, OSX)
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-2018-4183 CVE-2018-4182
                   CVE-2018-4181 CVE-2018-4180 CVE-2017-15400

Original Bulletin: 
   http://www.debian.org/security/2018/dsa-4243

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running cups check for an updated version of the software for their
         operating system.

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Debian Security Advisory DSA-4243-1                   security@debian.org
https://www.debian.org/security/                            Luciano Bello
July 11, 2018                         https://www.debian.org/security/faq
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Package        : cups
CVE ID         : CVE-2017-15400 CVE-2018-4180 CVE-2018-4181 CVE-2018-4182 
                 CVE-2018-4183 CVE-2018-6553

Several vulnerabilities were discovered in CUPS, the Common UNIX Printing
System. These issues have been identified with the following CVE ids:

CVE-2017-15400

    Rory McNamara discovered that an attacker is able to execute arbitrary
    commands (with the privilege of the CUPS daemon) by setting a
    malicious IPP server with a crafted PPD file.

CVE-2018-4180

     Dan Bastone of Gotham Digital Science discovered that a local
     attacker with access to cupsctl could escalate privileges by setting
     an environment variable. 

CVE-2018-4181

     Eric Rafaloff and John Dunlap of Gotham Digital Science discovered
     that a local attacker can perform limited reads of arbitrary files
     as root by manipulating cupsd.conf.

CVE-2018-4182

    Dan Bastone of Gotham Digital Science discovered that an attacker
    with sandboxed root access can execute backends without a sandbox
    profile by provoking an error in CUPS' profile creation.

CVE-2018-4183

     Dan Bastone and Eric Rafaloff of Gotham Digital Science discovered
     that an attacker with sandboxed root access can execute arbitrary
     commands as unsandboxed root by modifying /etc/cups/cups-files.conf

CVE-2018-6553

    Dan Bastone of Gotham Digital Science discovered that an attacker
    can bypass the AppArmor cupsd sandbox by invoking the dnssd backend
    using an alternate name that has been hard linked to dnssd.


For the stable distribution (stretch), these problems have been fixed in
version 2.2.1-8+deb9u2.

We recommend that you upgrade your cups packages.

For the detailed security status of cups please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/cups

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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