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Amazon Linux AMI : mercurial (ALAS-2017-893)

critical Nessus Plugin ID 103227

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Synopsis

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

Description

A shell command injection flaw related to the handling of 'ssh' URLs has been discovered in Mercurial. This can be exploited to execute shell commands with the privileges of the user running the Mercurial client, for example, when performing a 'checkout' or 'update' action on a sub-repository within a malicious repository or a legitimate repository containing a malicious commit. (CVE-2017-1000116)

A vulnerability was found in the way Mercurial handles path auditing and caches the results. An attacker could abuse a repository with a series of commits mixing symlinks and regular files/directories to trick Mercurial into writing outside of a given repository.
(CVE-2017-1000115)

Solution

Run 'yum update mercurial' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2017-893.html

Plugin Details

Severity: Critical

ID: 103227

File Name: ala_ALAS-2017-893.nasl

Version: 3.5

Type: local

Agent: unix

Published: 9/15/2017

Updated: 5/13/2019

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

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

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:amazon:linux:mercurial-debuginfo, p-cpe:/a:amazon:linux:emacs-mercurial, p-cpe:/a:amazon:linux:mercurial-common, p-cpe:/a:amazon:linux:mercurial-python27, p-cpe:/a:amazon:linux:mercurial-python26, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:emacs-mercurial-el

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

Patch Publication Date: 9/14/2017

Vulnerability Publication Date: 10/5/2017

Reference Information

CVE: CVE-2017-1000115, CVE-2017-1000116

ALAS: 2017-893