==========================================================================
Ubuntu Security Notice USN-3658-1
May 23, 2018

procps 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 procps-ng.

Software Description:
- procps: /proc file system utilities

Details:

It was discovered that the procps-ng top utility incorrectly read its
configuration file from the current working directory. A local attacker
could possibly use this issue to escalate privileges. (CVE-2018-1122)

It was discovered that the procps-ng ps tool incorrectly handled memory. A
local user could possibly use this issue to cause a denial of service.
(CVE-2018-1123)

It was discovered that libprocps incorrectly handled the file2strvec()
function. A local attacker could possibly use this to execute arbitrary
code. (CVE-2018-1124)

It was discovered that the procps-ng pgrep utility incorrectly handled
memory. A local attacker could possibly use this issue to cause de denial
of service. (CVE-2018-1125)

It was discovered that procps-ng incorrectly handled memory. A local
attacker could use this issue to cause a denial of service, or possibly
execute arbitrary code. (CVE-2018-1126)

Update instructions:

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

Ubuntu 18.04 LTS:
  libprocps6                      2:3.3.12-3ubuntu1.1
  procps                          2:3.3.12-3ubuntu1.1

Ubuntu 17.10:
  libprocps6                      2:3.3.12-1ubuntu2.1
  procps                          2:3.3.12-1ubuntu2.1

Ubuntu 16.04 LTS:
  libprocps4                      2:3.3.10-4ubuntu2.4
  procps                          2:3.3.10-4ubuntu2.4

Ubuntu 14.04 LTS:
  libprocps3                      1:3.3.9-1ubuntu2.3
  procps                          1:3.3.9-1ubuntu2.3

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

References:
  https://usn.ubuntu.com/usn/usn-3658-1
  CVE-2018-1122, CVE-2018-1123, CVE-2018-1124, CVE-2018-1125,
  CVE-2018-1126

Package Information:
  https://launchpad.net/ubuntu/+source/procps/2:3.3.12-3ubuntu1.1
  https://launchpad.net/ubuntu/+source/procps/2:3.3.12-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/procps/2:3.3.10-4ubuntu2.4
  https://launchpad.net/ubuntu/+source/procps/1:3.3.9-1ubuntu2.3