CVE-2017-0903

Publication date 11 October 2017

Last updated 18 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution.

Read the notes from the security team

Status

Package Ubuntu Release Status

Notes

tyhicks

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

leosilva

following http://www.openwall.com/lists/oss-security/2017/10/10/2, versions < 2.0.0 of ruby are not affected

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H