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Debian DLA-1480-1 : ruby2.1 security update

critical Nessus Plugin ID 112167

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Synopsis

The remote Debian host is missing a security update.

Description

Several vulnerabilities were discovered in Ruby 2.1.

CVE-2016-2337

Type confusion exists in _cancel_eval Ruby's TclTkIp class method.
Attacker passing different type of object than String as 'retval' argument can cause arbitrary code execution.

CVE-2018-1000073

RubyGems contains a Directory Traversal vulnerability in install_location function of package.rb that can result in path traversal when writing to a symlinked basedir outside of the root.

CVE-2018-1000074

RubyGems contains a Deserialization of Untrusted Data vulnerability in owner command that can result in code execution. This attack appear to be exploitable via victim must run the `gem owner` command on a gem with a specially crafted YAML file.

For Debian 8 'Jessie', these problems have been fixed in version 2.1.5-2+deb8u5.

We recommend that you upgrade your ruby2.1 packages.

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

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2018/08/msg00028.html

https://packages.debian.org/source/jessie/ruby2.1

Plugin Details

Severity: Critical

ID: 112167

File Name: debian_DLA-1480.nasl

Version: 1.5

Type: local

Agent: unix

Published: 8/29/2018

Updated: 8/14/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2016-2337

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:ruby2.1, p-cpe:/a:debian:debian_linux:libruby2.1, p-cpe:/a:debian:debian_linux:ruby2.1-doc, p-cpe:/a:debian:debian_linux:ruby2.1-tcltk, cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:ruby2.1-dev

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/27/2018

Reference Information

CVE: CVE-2016-2337, CVE-2018-1000073, CVE-2018-1000074