{
    "id": "CVE-2005-0021",
    "published": "2005-05-02 04:00:00",
    "last_modified": "2026-06-16 22:10:22",
    "cvss_score": "7.2",
    "cvss_severity": "HIGH",
    "cvss_version": "2.0",
    "cvss_vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
    "cwe": null,
    "description": "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.",
    "epss_score": "0.02618",
    "epss_percentile": "0.85008",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-09 18:17:05",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "university_of_cambridge",
            "product": "exim"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "1009",
            "title": "Exim 4.41 - 'dns_build_reverse' Local Read Emails",
            "date": "2005-05-25",
            "url": "https://www.exploit-db.com/exploits/1009"
        },
        {
            "source": "exploit-db",
            "ref_id": "756",
            "title": "Exim 4.41 - 'dns_build_reverse' Local Buffer Overflow",
            "date": "2005-01-15",
            "url": "https://www.exploit-db.com/exploits/756"
        }
    ],
    "refs_list": [
        "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"
    ]
}