zsh before 5.0.7 allows evaluation of the initial values of integer variables imported from the environment (instead of treating them as literal numbers). That could allow local privilege escalation, under some specific and atypical conditions where zsh is being invoked in privilege-elevation contexts when the environment has not been properly sanitized, such as when zsh is invoked by sudo on systems where "env_reset" has been disabled.

Affected: Ubuntu:14.04:LTS: zsh, Ubuntu:16.04:LTS: zsh

It was discovered that Zsh incorrectly handled certain enviroment variables. An attacker could possibly use this issue to gain privileged access to the system. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-10070)

It was discovered that Zsh incorrectly handled certain inputs. An attacker could possibly use this to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-10071)

It was discovered that Zsh incorrectly handled some symbolic links. An attacker could possibly use this to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-10072)

It was discovered that Zsh incorrectly handled certain errors. An attacker could possibly use this issue to cause a denial of service. (CVE-2016-10714)

It was discovered that Zsh incorrectly handled certain commands. An attacker could possibly use this to execute arbitrary code. (CVE-2017-18205)

It was discovered that Zsh incorrectly handled certain symlinks. An attacker could possibly use this to execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-18206)

It was discovered that Zsh incorrectly handled certain inputs. An attacker could possible use to execute arbitrary code. This issue only affected Ubuntu 17.10. (CVE-2018-7548)

It was discovered that Zsh incorrectly handled certain inputs. An attacker could possibly use this to cause a denial of service. (CVE-2018-7549)