UBUNTU-CVE-2018-16868

    Dashboard / Vulnerabilities / UBUNTU-CVE-2018-16868

    UBUNTU-CVE-2018-16868

    Published: 3 Dec 2018Last Modified: 22 Jul 2026
    Upstream:
    CVE-2018-16868

    Summary:

    Details: A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles verification of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run process on the same physical core as the victim process, could use this to extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.

    References: https://ubuntu.com/security/CVE-2018-16868, http://cat.eyalro.net/, https://www.cve.org/CVERecord?id=CVE-2018-16868

    Affected packages

    Package

    Name: gnutls26

    Purl: pkg:deb/ubuntu/gnutls26?arch=source&distro=esm-infra-legacy%2Ftrusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.12.23-1ubuntu4
    2.12.23-1ubuntu5
    2.12.23-12ubuntu1
    2.12.23-12ubuntu2
    2.12.23-12ubuntu2.1
    2.12.23-12ubuntu2.2
    2.12.23-12ubuntu2.3
    2.12.23-12ubuntu2.4
    2.12.23-12ubuntu2.5
    2.12.23-12ubuntu2.6
    2.12.23-12ubuntu2.7
    2.12.23-12ubuntu2.8
    2.12.23-12ubuntu2.10+esm1

    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