Ubuntu 14.04 LTS / 16.04 LTS / 17.10 : zsh vulnerabilities (USN-3593-1)

critical Nessus Plugin ID 107257

Synopsis

The remote Ubuntu host is missing a security-related patch.

Description

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).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected zsh package.

See Also

https://usn.ubuntu.com/3593-1/

Plugin Details

Severity: Critical

ID: 107257

File Name: ubuntu_USN-3593-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 3/9/2018

Updated: 9/18/2019

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:zsh, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:17.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Patch Publication Date: 3/8/2018

Vulnerability Publication Date: 2/27/2018

Reference Information

CVE: CVE-2014-10070, CVE-2014-10071, CVE-2014-10072, CVE-2016-10714, CVE-2017-18205, CVE-2017-18206, CVE-2018-7548, CVE-2018-7549

USN: 3593-1