CVE-2017-17790

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    CVE-2017-17790

    Published: 20 Dec 2017Last Modified: 8 Jul 2026

    Summary:

    Details: The lazy_initialize function in lib/resolv.rb in Ruby through 2.4.3 uses Kernel#open, 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.

    References: 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://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://www.debian.org/security/2018/dsa-4259, https://github.com/ruby/ruby/pull/1777

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 7393bf6a5cfff63683f36535e293caaa0d4c5be0
    Fixed -None

    Affected versions

    2.5.0-preview1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High