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