RHEL 7 : zsh (RHSA-2018:3073)

critical Nessus Plugin ID 118524

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

An update for zsh is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The zsh shell is a command interpreter usable as an interactive login shell and as a shell script command processor. Zsh resembles the ksh shell (the Korn shell), but includes many enhancements. Zsh supports command-line editing, built-in spelling correction, programmable command completion, shell functions (with autoloading), a history mechanism, and more.

Security Fix(es) :

* zsh: Stack-based buffer overflow in gen_matches_files() at compctl.c (CVE-2018-1083)

* zsh: buffer overflow for very long fds in >& fd syntax (CVE-2014-10071)

* zsh: buffer overflow when scanning very long directory paths for symbolic links (CVE-2014-10072)

* zsh: NULL dereference in cd in sh compatibility mode under given circumstances (CVE-2017-18205)

* zsh: buffer overrun in symlinks (CVE-2017-18206)

* zsh: Stack-based buffer overflow in exec.c:hashcmd() (CVE-2018-1071)

* zsh: buffer overflow in utils.c:checkmailpath() can lead to local arbitrary code execution (CVE-2018-1100)

* zsh: crash on copying empty hash table (CVE-2018-7549)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

The CVE-2018-1083, CVE-2018-1071, and CVE-2018-1100 issues were discovered by Richard Maciel Costa (Red Hat).

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes linked from the References section.

Solution

Update the affected zsh, zsh-debuginfo and / or zsh-html packages.

See Also

http://www.nessus.org/u?3395ff0b

https://access.redhat.com/errata/RHSA-2018:3073

https://access.redhat.com/security/cve/cve-2014-10071

https://access.redhat.com/security/cve/cve-2014-10072

https://access.redhat.com/security/cve/cve-2017-18205

https://access.redhat.com/security/cve/cve-2017-18206

https://access.redhat.com/security/cve/cve-2018-1071

https://access.redhat.com/security/cve/cve-2018-1083

https://access.redhat.com/security/cve/cve-2018-1100

https://access.redhat.com/security/cve/cve-2018-7549

Plugin Details

Severity: Critical

ID: 118524

File Name: redhat-RHSA-2018-3073.nasl

Version: 1.6

Type: local

Agent: unix

Published: 10/31/2018

Updated: 2/1/2022

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

Risk Information

CVSS Score Source: CVE-2017-18206

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:zsh, p-cpe:/a:redhat:enterprise_linux:zsh-debuginfo, p-cpe:/a:redhat:enterprise_linux:zsh-html, cpe:/o:redhat:enterprise_linux:7

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 10/30/2018

Vulnerability Publication Date: 2/27/2018

Reference Information

CVE: CVE-2014-10071, CVE-2014-10072, CVE-2017-18205, CVE-2017-18206, CVE-2018-1071, CVE-2018-1083, CVE-2018-1100, CVE-2018-7549

RHSA: 2018:3073