CVE-2017-17790 Information

Description

The lazy_initialize function in lib/resolv.rb in Ruby through 2.4.3 uses Kernelopen which might allow Command Injection attacks as demonstrated by a Resolv::Hosts::new argument beginning with a ‘|’ character a different vulnerability than CVE-2017-17405. NOTE: situations with untrusted input may be highly unlikely.

CVSS Vector

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

Reference

https://access.redhat.com/errata/RHSA-2018:0378 https://access.redhat.com/errata/RHSA-2018:0583 https://access.redhat.com/errata/RHSA-2018:0584 https://access.redhat.com/errata/RHSA-2018:0585 https://github.com/ruby/ruby/pull/1777 https://lists.debian.org/debian-lts-announce/2017/12/msg00024.html https://lists.debian.org/debian-lts-announce/2017/12/msg00025.html https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html https://www.debian.org/security/2018/dsa-4259

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8