CVE-2005-0021

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    CVE-2005-0021

    Published: 2 May 2005Last Modified: 10 Apr 2026

    Summary:

    Details: Multiple buffer overflows in Exim before 4.43 may allow attackers to execute arbitrary code via (1) an IPv6 address with more than 8 components, as demonstrated using the -be command line option, which triggers an overflow in the host_aton function, or (2) the -bh command line option or dnsdb PTR lookup, which triggers an overflow in the dns_build_reverse function.

    References: http://security.gentoo.org/glsa/glsa-200501-23.xml, http://www.debian.org/security/2005/dsa-635, http://www.debian.org/security/2005/dsa-637, http://www.idefense.com/application/poi/display?id=179&type=vulnerabilities, http://www.idefense.com/application/poi/display?id=183&type=vulnerabilities, http://www.idefense.com/application/poi/display?id=183&type=vulnerabilities, http://www.kb.cert.org/vuls/id/132992, http://www.redhat.com/support/errata/RHSA-2005-025.html, http://ftp6.us.freebsd.org/pub/mail/exim/ChangeLogs/ChangeLog-4.44, http://www.exim.org/mail-archives/exim-users/Week-of-Mon-20050103/msg00028.html, http://www.kb.cert.org/vuls/id/132992, https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10347

    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