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    CVE-2005-0021

    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.

    Published:Jan 4, 2005
    Last Modified:Apr 16, 2026
    EPS:Jan 6, 2005
    EPSS Score:0.02817
    CVSS Score:7.2

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    University Of Cambridge
    Product
    Exim

    Exploits

    http://www.idefense.com/application/poi/display?id=183&type=vulnerabilitieshttp://www.idefense.com/application/poi/display?id=183&type=vulnerabilitieshttps://www.exploit-db.com/exploits/756https://www.exploit-db.com/exploits/1009

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://ftp6.us.freebsd.org/pub/mail/exim/ChangeLogs/ChangeLog-4.44
    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.exim.org/mail-archives/exim-users/Week-of-Mon-20050103/msg00028.html
    http://www.idefense.com/application/poi/display?id=179&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
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10347
    http://ftp6.us.freebsd.org/pub/mail/exim/ChangeLogs/ChangeLog-4.44
    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.exim.org/mail-archives/exim-users/Week-of-Mon-20050103/msg00028.html
    http://www.idefense.com/application/poi/display?id=179&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
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10347

    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