{
  "id": "CVE-2010-4344",
  "url": "https://spydr.io/cve/CVE-2010-4344",
  "published": "2010-12-14T16:00:04.163Z",
  "modified": "2026-06-16T23:24:36.107Z",
  "score": 9.8,
  "severity": "critical",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "NVD",
  "epss": 0.71706,
  "epss_percentile": 0.9941,
  "exploited": true,
  "kev": {
    "added": "2022-03-25",
    "due": "2022-04-15",
    "action": "Apply updates per vendor instructions.",
    "ransomware": "Unknown",
    "name": "Exim Heap-Based Buffer Overflow Vulnerability",
    "notes": "https://nvd.nist.gov/vuln/detail/CVE-2010-4344"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "exim",
    "opensuse",
    "debian",
    "canonical"
  ],
  "products": [
    "exim",
    "opensuse",
    "debian linux",
    "canonical ubuntu linux"
  ],
  "cwes": [
    "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.",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 9.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "http://atmail.com/blog/2010/atmail-6204-now-available/",
      "tags": [
        "Broken Link"
      ]
    },
    {
      "url": "http://bugs.exim.org/show_bug.cgi?id=787",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "http://git.exim.org/exim.git/commit/24c929a27415c7cfc7126c47e4cad39acf3efa6b",
      "tags": [
        "Mailing List",
        "Patch"
      ]
    },
    {
      "url": "http://lists.exim.org/lurker/message/20101210.164935.385e04d0.en.html",
      "tags": [
        "Mailing List",
        "Patch"
      ]
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00003.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://openwall.com/lists/oss-security/2010/12/10/1",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://secunia.com/advisories/40019",
      "tags": [
        "Broken Link",
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://secunia.com/advisories/42576",
      "tags": [
        "Broken Link",
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://secunia.com/advisories/42586",
      "tags": [
        "Broken Link",
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://secunia.com/advisories/42587",
      "tags": [
        "Broken Link",
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://secunia.com/advisories/42589",
      "tags": [
        "Broken Link",
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://www.cpanel.net/2010/12/exim-remote-memory-corruption-vulnerability-notification-cve-2010-4344.html",
      "tags": [
        "Broken Link"
      ]
    },
    {
      "url": "http://www.debian.org/security/2010/dsa-2131",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://www.exim.org/lurker/message/20101207.215955.bb32d4f2.en.html",
      "tags": [
        "Exploit",
        "Mailing List"
      ]
    },
    {
      "url": "http://www.kb.cert.org/vuls/id/682457",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ]
    },
    {
      "url": "http://www.metasploit.com/modules/exploit/unix/smtp/exim4_string_format",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2021/05/04/7",
      "tags": [
        "Exploit",
        "Mailing List"
      ]
    },
    {
      "url": "http://www.osvdb.org/69685",
      "tags": [
        "Broken Link",
        "Exploit",
        "Patch"
      ]
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2010-0970.html",
      "tags": [
        "Broken Link"
      ]
    },
    {
      "url": "http://www.securityfocus.com/archive/1/515172/100/0/threaded",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ]
    },
    {
      "url": "http://www.securityfocus.com/bid/45308",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ]
    },
    {
      "url": "http://www.securitytracker.com/id?1024858",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ]
    },
    {
      "url": "http://www.theregister.co.uk/2010/12/11/exim_code_execution_peril/",
      "tags": [
        "Press/Media Coverage"
      ]
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-1032-1",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://www.vupen.com/english/advisories/2010/3171",
      "tags": [
        "Broken Link",
        "Vendor Advisory"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2010-4344",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}