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Debian DLA-2158-1 : ruby2.1 security update

critical Nessus Plugin ID 134915

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Synopsis

The remote Debian host is missing a security update.

Description

An exploitable heap overflow vulnerability exists in the Psych::Emitter startdocument function of Ruby. In Psych::Emitter startdocument function heap buffer 'head' allocation is made based on tags array length. Specially constructed object passed as element of tags array can increase this array size after mentioned allocation and cause heap overflow

For Debian 8 'Jessie', this problem has been fixed in version 2.1.5-2+deb8u9.

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/2020/03/msg00032.html

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

Plugin Details

Severity: Critical

ID: 134915

File Name: debian_DLA-2158.nasl

Version: 1.4

Type: local

Agent: unix

Published: 3/26/2020

Updated: 3/20/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2016-2338

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:libruby2.1, p-cpe:/a:debian:debian_linux:ruby2.1, p-cpe:/a:debian:debian_linux:ruby2.1-dev, 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

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: 3/25/2020

Reference Information

CVE: CVE-2016-2338