1. Ubuntu Security Notices
  2. USN-3713-1

USN-3713-1: CUPS vulnerabilities

Publication date

11 July 2018

Overview

Several security issues were fixed in CUPS.

Releases

Packages

  • 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...

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.04 bionic cups –  2.2.7-1ubuntu2.1
17.10 artful cups –  2.2.4-7ubuntu3.1
16.04 xenial cups –  2.1.3-4ubuntu0.5
14.04 trusty cups –  1.7.2-0ubuntu1.10

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References

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