UBUNTU-CVE-2018-8778

    Dashboard / Vulnerabilities / UBUNTU-CVE-2018-8778

    UBUNTU-CVE-2018-8778

    Published: 3 Apr 2018Last Modified: 22 Apr 2026
    Upstream:
    CVE-2018-8778
    Aliases:
    USN-3626-1

    Summary:

    Details: In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an attacker controlling the unpacking format (similar to format string vulnerabilities) can trigger a buffer under-read in the String#unpack method, resulting in a massive and controlled information disclosure.

    References: https://ubuntu.com/security/CVE-2018-8778, https://www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/, https://github.com/ruby/ruby/commit/d02b7bd864706fc2a40d83fb6014772ad3cc3b80, https://github.com/ruby/ruby/commit/4cd92d7b13002161a3452a0fe278b877901a8859, https://ubuntu.com/security/notices/USN-3626-1, https://www.cve.org/CVERecord?id=CVE-2018-8778

    Affected packages

    Package

    Name: ruby1.9.1

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.9.3.484-2ubuntu1.11

    Affected versions

    1.9.3.194-8.1ubuntu2
    1.9.3.448-1ubuntu1
    1.9.3.448-1ubuntu2
    1.9.3.484-1ubuntu1
    1.9.3.484-1ubuntu2
    1.9.3.484-2ubuntu1
    1.9.3.484-2ubuntu1.1
    1.9.3.484-2ubuntu1.2
    1.9.3.484-2ubuntu1.3
    1.9.3.484-2ubuntu1.5
    1.9.3.484-2ubuntu1.6
    1.9.3.484-2ubuntu1.7
    1.9.3.484-2ubuntu1.8
    1.9.3.484-2ubuntu1.10

    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