DEBIAN-CVE-2007-4321

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    DEBIAN-CVE-2007-4321

    Published: 14 Aug 2007Last Modified: 1 Sept 2026
    Upstream:
    CVE-2007-4321

    Summary:

    Details: fail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and cause a denial of service by adding arbitrary IP addresses to the sshd log file, as demonstrated by logging in via ssh with a client protocol version identification containing an IP address string, a different vector than CVE-2006-6302.

    References: https://security-tracker.debian.org/tracker/CVE-2007-4321

    Affected packages

    Package

    Name: fail2ban

    Purl: pkg:deb/debian/fail2ban?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.8.0-4

    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