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Debian DLA-2251-1 : rails security update

critical Nessus Plugin ID 137670

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Synopsis

The remote Debian host is missing a security update.

Description

Two vulnerabilities were found in Ruby on Rails, a MVC ruby-based framework geared for web application development, which could lead to remote code execution and untrusted user input usage, depending on the application.

CVE-2020-8164

Strong parameters bypass vector in ActionPack. In some cases user supplied information can be inadvertently leaked from Strong Parameters. Specifically the return value of `each`, or `each_value`, or `each_pair` will return the underlying 'untrusted' hash of data that was read from the parameters. Applications that use this return value may be inadvertently use untrusted user input.

CVE-2020-8165

Potentially unintended unmarshalling of user-provided objects in MemCacheStore. There is potentially unexpected behaviour in the MemCacheStore where, when untrusted user input is written to the cache store using the `raw: true` parameter, re-reading the result from the cache can evaluate the user input as a Marshalled object instead of plain text. Unmarshalling of untrusted user input can have impact up to and including RCE. At a minimum, this vulnerability allows an attacker to inject untrusted Ruby objects into a web application.

In addition to upgrading to the latest versions of Rails, developers should ensure that whenever they are calling `Rails.cache.fetch` they are using consistent values of the `raw` parameter for both reading and writing.

For Debian 8 'Jessie', these problems have been fixed in version 2:4.1.8-1+deb8u7.

We recommend that you upgrade your rails 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/2020/06/msg00022.html

https://packages.debian.org/source/jessie/rails

Plugin Details

Severity: Critical

ID: 137670

File Name: debian_DLA-2251.nasl

Version: 1.6

Type: local

Agent: unix

Published: 6/22/2020

Updated: 3/6/2024

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-2020-8165

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:ruby-rails, p-cpe:/a:debian:debian_linux:ruby-activerecord, p-cpe:/a:debian:debian_linux:ruby-actionmailer, p-cpe:/a:debian:debian_linux:ruby-railties, p-cpe:/a:debian:debian_linux:ruby-activemodel, p-cpe:/a:debian:debian_linux:ruby-activesupport-2.3, cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:ruby-activesupport, p-cpe:/a:debian:debian_linux:ruby-actionpack, p-cpe:/a:debian:debian_linux:rails, p-cpe:/a:debian:debian_linux:ruby-actionview

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: 6/19/2020

Vulnerability Publication Date: 6/19/2020

Reference Information

CVE: CVE-2020-8164, CVE-2020-8165