DEBIAN-CVE-2009-0021

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    DEBIAN-CVE-2009-0021

    Published: 7 Jan 2009Last Modified: 31 Aug 2026
    Upstream:
    CVE-2009-0021

    Summary:

    Details: NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077.

    References: https://security-tracker.debian.org/tracker/CVE-2009-0021

    Affected packages

    Package

    Name: ntp

    Purl: pkg:deb/debian/ntp?arch=source&distro=bullseye

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:4.2.4p4+dfsg-8

    Affected versions

    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