Amazon Linux 2 : zsh (ALAS-2018-1013)

high Nessus Plugin ID 109692

Language:

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

1553531 :

Stack-based buffer overflow in exec.c:hashcmd()

zsh through version 5.4.2 is vulnerable to a stack-based buffer overflow in the exec.c:hashcmd() function. A local attacker could exploit this to cause a denial of service.(CVE-2018-1071)

Stack-based buffer overflow in gen_matches_files() at compctl.c

A buffer overflow flaw was found in the zsh shell auto-complete functionality. A local, unprivileged user can create a specially crafted directory path which leads to code execution in the context of the user who tries to use auto-complete to traverse the before mentioned path. If the user affected is privileged, this leads to privilege escalation.(CVE-2018-1083)

Buffer overflow in utils.c:checkmailpath() can lead to local arbitrary code execution

A buffer overflow flaw was found in the zsh shell check path functionality. A local, unprivileged user can create a specially crafted message file, which, if used to set a custom 'you have new mail' message, leads to code execution in the context of the user who receives the message. If the user affected is privileged, this leads to privilege escalation.(CVE-2018-1100)

Solution

Run 'yum update zsh' to update your system.

Plugin Details

Severity: High

ID: 109692

File Name: al2_ALAS-2018-1013.nasl

Version: 1.2

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 5/11/2018

Updated: 8/31/2018

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS v3

Risk Factor: High

Base Score: 7.8

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:zsh, p-cpe:/a:amazon:linux:zsh-debuginfo, p-cpe:/a:amazon:linux:zsh-html, cpe:/o:amazon:linux:2

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

Patch Publication Date: 5/10/2018

Reference Information

CVE: CVE-2018-1071, CVE-2018-1083, CVE-2018-1100

ALAS: 2018-1013

Detections

Analytics