RHEL 7 : ruby (RHSA-2020:0542)

critical Nessus Plugin ID 133785
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:0542 advisory.

- rubygems: Path traversal when writing to a symlinked basedir outside of the root (CVE-2018-1000073)

- rubygems: Unsafe Object Deserialization Vulnerability in gem owner allowing arbitrary code execution on specially crafted YAML (CVE-2018-1000074)

- rubygems: Infinite loop vulnerability due to negative size in tar header causes Denial of Service (CVE-2018-1000075)

- rubygems: Improper verification of signatures in tarball allows to install mis-signed gem (CVE-2018-1000076)

- rubygems: Missing URL validation on spec home attribute allows malicious gem to set an invalid homepage URL (CVE-2018-1000077)

- rubygems: XSS vulnerability in homepage attribute when displayed via gem server (CVE-2018-1000078)

- rubygems: Path traversal issue during gem installation allows to write to arbitrary filesystem locations (CVE-2018-1000079)

- ruby: DoS by large request in WEBrick (CVE-2018-8777)

- ruby: Unintentional directory traversal by poisoned NULL byte in Dir (CVE-2018-8780)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://cwe.mitre.org/data/definitions/20.html

https://cwe.mitre.org/data/definitions/22.html

https://cwe.mitre.org/data/definitions/79.html

https://cwe.mitre.org/data/definitions/347.html

https://cwe.mitre.org/data/definitions/400.html

https://cwe.mitre.org/data/definitions/502.html

https://cwe.mitre.org/data/definitions/626.html

https://cwe.mitre.org/data/definitions/835.html

https://access.redhat.com/security/cve/CVE-2018-8777

https://access.redhat.com/security/cve/CVE-2018-8780

https://access.redhat.com/security/cve/CVE-2018-1000073

https://access.redhat.com/security/cve/CVE-2018-1000074

https://access.redhat.com/security/cve/CVE-2018-1000075

https://access.redhat.com/security/cve/CVE-2018-1000076

https://access.redhat.com/security/cve/CVE-2018-1000077

https://access.redhat.com/security/cve/CVE-2018-1000078

https://access.redhat.com/security/cve/CVE-2018-1000079

https://access.redhat.com/errata/RHSA-2020:0542

https://bugzilla.redhat.com/1547418

https://bugzilla.redhat.com/1547419

https://bugzilla.redhat.com/1547420

https://bugzilla.redhat.com/1547421

https://bugzilla.redhat.com/1547422

https://bugzilla.redhat.com/1547425

https://bugzilla.redhat.com/1547426

https://bugzilla.redhat.com/1561949

https://bugzilla.redhat.com/1561950

Plugin Details

Severity: Critical

ID: 133785

File Name: redhat-RHSA-2020-0542.nasl

Version: 1.6

Type: local

Agent: unix

Published: 2/19/2020

Updated: 10/13/2021

Dependencies: ssh_get_info.nasl, redhat_repos.nasl

Risk Information

CVSS Score Source: CVE-2018-8780

VPR

Risk Factor: Medium

Score: 6

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:rhel_eus:7.5, p-cpe:/a:redhat:enterprise_linux:ruby, p-cpe:/a:redhat:enterprise_linux:ruby-devel, p-cpe:/a:redhat:enterprise_linux:ruby-doc, p-cpe:/a:redhat:enterprise_linux:ruby-irb, p-cpe:/a:redhat:enterprise_linux:ruby-libs, p-cpe:/a:redhat:enterprise_linux:ruby-tcltk, p-cpe:/a:redhat:enterprise_linux:rubygem-bigdecimal, p-cpe:/a:redhat:enterprise_linux:rubygem-io-console, p-cpe:/a:redhat:enterprise_linux:rubygem-json, p-cpe:/a:redhat:enterprise_linux:rubygem-minitest, p-cpe:/a:redhat:enterprise_linux:rubygem-psych, p-cpe:/a:redhat:enterprise_linux:rubygem-rake, p-cpe:/a:redhat:enterprise_linux:rubygem-rdoc, p-cpe:/a:redhat:enterprise_linux:rubygems, p-cpe:/a:redhat:enterprise_linux:rubygems-devel

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/19/2020

Vulnerability Publication Date: 2/26/2018

Reference Information

CVE: CVE-2018-8777, CVE-2018-8780, CVE-2018-1000073, CVE-2018-1000074, CVE-2018-1000075, CVE-2018-1000076, CVE-2018-1000077, CVE-2018-1000078, CVE-2018-1000079

BID: 103683, 103739

RHSA: 2020:0542

CWE: 20, 22, 79, 347, 400, 502, 626, 835