FKIE_CVE-2020-7247

Vulnerability from fkie_nvd - Published: 2020-01-29 16:15 - Updated: 2025-11-07 22:02
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.
References
cve@mitre.orghttp://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
cve@mitre.orghttp://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
cve@mitre.orghttp://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
cve@mitre.orghttp://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
cve@mitre.orghttp://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.htmlBroken Link, Third Party Advisory, VDB Entry
cve@mitre.orghttp://seclists.org/fulldisclosure/2020/Jan/49Exploit, Mailing List, Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2020/01/28/3Exploit, Mailing List, Third Party Advisory
cve@mitre.orghttps://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45Patch
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/Mailing List, Third Party Advisory
cve@mitre.orghttps://seclists.org/bugtraq/2020/Jan/51Mailing List, Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/4268-1/Third Party Advisory
cve@mitre.orghttps://www.debian.org/security/2020/dsa-4611Mailing List, Third Party Advisory
cve@mitre.orghttps://www.kb.cert.org/vuls/id/390745Third Party Advisory, US Government Resource
cve@mitre.orghttps://www.openbsd.org/security.htmlPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.htmlBroken Link, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2020/Jan/49Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/01/28/3Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/bugtraq/2020/Jan/51Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4268-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2020/dsa-4611Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.kb.cert.org/vuls/id/390745Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108https://www.openbsd.org/security.htmlPatch, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247US Government Resource
Impacted products
Vendor Product Version
openbsd opensmtpd 6.6
debian debian_linux 9.0
debian debian_linux 10.0
fedoraproject fedora 32
canonical ubuntu_linux 18.04
canonical ubuntu_linux 19.10
To clipboard 

{
  "cisaActionDue": "2022-04-15",
  "cisaExploitAdd": "2022-03-25",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "OpenSMTPD Remote Code Execution Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openbsd:opensmtpd:6.6:*:*:*:*:*:*:*",
              "matchCriteriaId": "E2D1D6E5-21BA-40CC-870F-A940DD814532",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
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              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
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              "vulnerable": true
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          "negate": false,
          "operator": "OR"
        }
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    },
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
              "matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*",
              "matchCriteriaId": "A31C8344-3E02-4EB8-8BD8-4C84B7959624",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the \"uncommented\" default configuration. The issue exists because of an incorrect return value upon failure of input validation."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n smtp_mailaddr en el archivo smtp_session.c en OpenSMTPD versi\u00f3n 6.6, como es usado en OpenBSD versi\u00f3n 6.6 y otros productos, permite a atacantes remotos ejecutar comandos arbitrarios como root por medio de una sesi\u00f3n SMTP dise\u00f1ada, como es demostrado por metacaracteres de shell en un campo MAIL FROM. Esto afecta la configuraci\u00f3n predeterminada \"uncommented\". El problema se presenta debido a un valor de retorno incorrecto tras un fallo en la comprobaci\u00f3n de entrada."
    }
  ],
  "id": "CVE-2020-7247",
  "lastModified": "2025-11-07T22:02:55.513",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 10.0,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2020-01-29T16:15:12.897",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
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  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        },
        {
          "lang": "en",
          "value": "CWE-755"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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    {
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        {
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          "value": "CWE-755"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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