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==========================================================================
Ubuntu Security Notice USN-3764-1
September 11, 2018

zsh vulnerabilities
==========================================================================

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Zsh could be made to execute arbitrary code if it received
a specially crafted script.

Software Description:
- zsh: shell with lots of features

Details:

It was discovered that Zsh incorrectly handled certain scripts.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2018-0502, CVE-2018-13259)

Richard Maciel Costa discovered that Zsh incorrectly handled certain
scripts. An attacker could possibly use this issue to execute arbitrary
code. (CVE-2018-1100)

Update instructions:

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

Ubuntu 18.04 LTS:
  zsh                             5.4.2-3ubuntu3.1

Ubuntu 16.04 LTS:
  zsh                             5.1.1-1ubuntu2.3

Ubuntu 14.04 LTS:
  zsh                             5.0.2-3ubuntu6.3

After a standard system update you need to restart Zsh to make
all the necessary changes.

References:
  https://usn.ubuntu.com/usn/usn-3764-1
  CVE-2018-0502, CVE-2018-1100, CVE-2018-13259

Package Information:
  https://launchpad.net/ubuntu/+source/zsh/5.4.2-3ubuntu3.1
  https://launchpad.net/ubuntu/+source/zsh/5.1.1-1ubuntu2.3
  https://launchpad.net/ubuntu/+source/zsh/5.0.2-3ubuntu6.3
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