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

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

Priority

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package	Release	Status
jruby Launchpad, Ubuntu, Debian	artful	Ignored (reached end-of-life)
	bionic	Needs triage
	cosmic	Ignored (reached 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)
	groovy	Not vulnerable (9.1.17.0-3)
	hirsute	Not vulnerable (9.1.17.0-3)
	impish	Not vulnerable (9.1.17.0-3)
	precise	Does not exist
	trusty	Released (1.5.6-9+deb8u2build0.14.04.1~esm2)
	upstream	Needs triage
	xenial	Needs triage
ruby1.9.1 Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was released [1.9.3.484-2ubuntu1.12])
	upstream	Needs triage
	xenial	Does not exist
ruby2.0 Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was released [2.0.0.484-1ubuntu2.10])
	upstream	Needs triage
	xenial	Does not exist
ruby2.1 Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
ruby2.3 Launchpad, Ubuntu, Debian	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
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Released (2.3.1-2~16.04.7)
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
	precise	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	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

References

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