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==========================================================================
Ubuntu Security Notice USN-4171-2
November 04, 2019

apport vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in Apport.

Software Description:
- apport: automatically generate crash reports for debugging

Details:

USN-4171-1 fixed several vulnerabilities in apport. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

 Kevin Backhouse discovered Apport would read its user-controlled settings
 file as the root user. This could be used by a local attacker to possibly
 crash Apport or have other unspecified consequences. (CVE-2019-11481)

 Sander Bos discovered a race-condition in Apport during core dump
 creation. This could be used by a local attacker to generate a crash report
 for a privileged process that is readable by an unprivileged user.
 (CVE-2019-11482)

 Sander Bos discovered Apport mishandled crash dumps originating from
 containers. This could be used by a local attacker to generate a crash
 report for a privileged process that is readable by an unprivileged user.
 (CVE-2019-11483)

 Sander Bos discovered Apport mishandled lock-file creation. This could be
 used by a local attacker to cause a denial of service against Apport.
 (CVE-2019-11485)

 Kevin Backhouse discovered Apport read various process-specific files with
 elevated privileges during crash dump generation. This could could be used
 by a local attacker to generate a crash report for a privileged process
 that is readable by an unprivileged user. (CVE-2019-15790)

Update instructions:

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

Ubuntu 14.04 ESM:
  apport                          2.14.1-0ubuntu3.29+esm2
  python-apport                   2.14.1-0ubuntu3.29+esm2
  python3-apport                  2.14.1-0ubuntu3.29+esm2

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

References:
  https://usn.ubuntu.com/4171-2
  https://usn.ubuntu.com/4171-1
  CVE-2019-11481, CVE-2019-11482, CVE-2019-11483, CVE-2019-11485,
  CVE-2019-15790

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