CVE-2000-1221

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    CVE-2000-1221

    Published: 8 Jan 2000Last Modified: 10 Apr 2026

    Summary:

    Details: The line printer daemon (lpd) in the lpr package in multiple Linux operating systems authenticates by comparing the reverse-resolved hostname of the local machine to the hostname of the print server as returned by gethostname, which allows remote attackers to bypass intended access controls by modifying the DNS for the attacking IP.

    References: http://rhn.redhat.com/errata/RHSA-2000-002.html, http://www.atstake.com/research/advisories/2000/lpd_advisory.txt, http://www.l0pht.com/advisories/lpd_advisory, ftp://patches.sgi.com/support/free/security/advisories/20021104-01-P, http://www.debian.org/security/2000/20000109, http://www.kb.cert.org/vuls/id/30308, http://www.securityfocus.com/bid/927, https://exchange.xforce.ibmcloud.com/vulnerabilities/3840

    Affected packages

    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