{
    "id": "CVE-2010-4344",
    "published": "2010-12-14 16:00:04",
    "last_modified": "2026-06-16 23:24:36",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-787",
    "description": "Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session that includes two MAIL commands in conjunction with a large message containing crafted headers, leading to improper rejection logging.",
    "epss_score": "0.71706",
    "epss_percentile": "0.99405",
    "kev": 1,
    "kev_due": "2022-04-15",
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:17:53",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-04-15."
    },
    "products": [
        {
            "vendor": "canonical",
            "product": "ubuntu_linux"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "exim",
            "product": "exim"
        },
        {
            "vendor": "opensuse",
            "product": "opensuse"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2010-4344",
        "date_added": "2022-03-25",
        "due_date": "2022-04-15",
        "vendor": "Exim",
        "product": "Exim",
        "name": "Exim Heap-Based Buffer Overflow Vulnerability",
        "ransomware": 0
    },
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "16925",
            "title": "Exim4 < 4.69 - string_format Function Heap Buffer Overflow (Metasploit)",
            "date": "2010-12-16",
            "url": "https://www.exploit-db.com/exploits/16925"
        },
        {
            "source": "exploit-db",
            "ref_id": "15725",
            "title": "Exim 4.63 - Remote Command Execution",
            "date": "2010-12-11",
            "url": "https://www.exploit-db.com/exploits/15725"
        }
    ],
    "refs_list": [
        "ftp://ftp.exim.org/pub/exim/ChangeLogs/ChangeLog-4.70",
        "http://atmail.com/blog/2010/atmail-6204-now-available/",
        "http://bugs.exim.org/show_bug.cgi?id=787",
        "http://git.exim.org/exim.git/commit/24c929a27415c7cfc7126c47e4cad39acf3efa6b",
        "http://lists.exim.org/lurker/message/20101210.164935.385e04d0.en.html",
        "http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00003.html",
        "http://openwall.com/lists/oss-security/2010/12/10/1",
        "http://secunia.com/advisories/40019",
        "http://secunia.com/advisories/42576",
        "http://secunia.com/advisories/42586",
        "http://secunia.com/advisories/42587",
        "http://secunia.com/advisories/42589",
        "http://www.cpanel.net/2010/12/exim-remote-memory-corruption-vulnerability-notification-cve-2010-4344.html",
        "http://www.debian.org/security/2010/dsa-2131",
        "http://www.exim.org/lurker/message/20101207.215955.bb32d4f2.en.html",
        "http://www.kb.cert.org/vuls/id/682457",
        "http://www.metasploit.com/modules/exploit/unix/smtp/exim4_string_format",
        "http://www.openwall.com/lists/oss-security/2021/05/04/7",
        "http://www.osvdb.org/69685",
        "http://www.redhat.com/support/errata/RHSA-2010-0970.html",
        "http://www.securityfocus.com/archive/1/515172/100/0/threaded",
        "http://www.securityfocus.com/bid/45308",
        "http://www.securitytracker.com/id?1024858",
        "http://www.theregister.co.uk/2010/12/11/exim_code_execution_peril/",
        "http://www.ubuntu.com/usn/USN-1032-1"
    ]
}