Several security issues were fixed in Zsh.
Richard Maciel Costa discovered that Zsh incorrectly handled certain inputs. An attacker could possibly use this to cause a denial of service. (CVE-2018-1071)
27 March 2018
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in Zsh.
Richard Maciel Costa discovered that Zsh incorrectly handled certain inputs. An attacker could possibly use this to cause a denial of service. (CVE-2018-1071)
It was discovered that Zsh incorrectly handled certain files. An attacker could possibly use this to execute arbitrary code. (CVE-2018-1083)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Zsh to make all the necessary changes