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CVE-2018-1000074

Published: 13 March 2018

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 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. This vulnerability appears to have been fixed in 2.7.6.

From the Ubuntu Security Team

It was discovered that the RubyGems embedded in JRuby would deserialize unsafe objects in untrusted YAML. If a user were tricked into using the `gem owner` command on a malicious ruby gem, JRuby could execute a malicious payload.

Notes

AuthorNote
tyhicks
ruby{1.9.1,2.0,2.3} and jruby ship an embedded rubygems.

Priority

Medium

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
jruby
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Needs triage

cosmic Ignored
(end of life)
disco Not vulnerable
(9.1.17.0-2)
eoan Not vulnerable
(9.1.17.0-3)
focal Not vulnerable
(9.1.17.0-3)
upstream Needs triage

groovy Not vulnerable
(9.1.17.0-3)
hirsute Not vulnerable
(9.1.17.0-3)
impish Not vulnerable
(9.1.17.0-3)
lunar Not vulnerable
(9.1.17.0-3)
trusty
Released (1.5.6-9+deb8u2build0.14.04.1~esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial Needs triage

mantic Not vulnerable
(9.1.17.0-3)
ruby1.9.1
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

groovy Does not exist

jammy Does not exist

kinetic Does not exist

eoan Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

lunar Does not exist

trusty
Released (1.9.3.484-2ubuntu1.12)
upstream Needs triage

xenial Does not exist

mantic Does not exist

ruby2.0
Launchpad, Ubuntu, Debian
groovy Does not exist

jammy Does not exist

kinetic Does not exist

artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

lunar Does not exist

trusty
Released (2.0.0.484-1ubuntu2.10)
upstream Needs triage

xenial Does not exist

mantic Does not exist

ruby2.1
Launchpad, Ubuntu, Debian
groovy Does not exist

jammy Does not exist

kinetic Does not exist

artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

ruby2.3
Launchpad, Ubuntu, Debian
groovy Does not exist

jammy Does not exist

kinetic Does not exist

artful
Released (2.3.3-1ubuntu1.4)
bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial
Released (2.3.1-2~16.04.7)
mantic Does not exist

ruby2.5
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (2.5.1-1)
cosmic
Released (2.5.1-1)
disco
Released (2.5.1-1)
eoan
Released (2.5.1-1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H