FKIE_CVE-2017-17688

Vulnerability from fkie_nvd - Published: 2018-05-16 19:29 - Updated: 2026-06-17 01:11
Severity
5.9 (Medium) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. NOTE: third parties report that this is a problem in applications that mishandle the Modification Detection Code (MDC) feature or accept an obsolete packet type, not a problem in the OpenPGP specification
References
cve@mitre.orghttp://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.htmlThird Party Advisory
cve@mitre.orghttp://www.securityfocus.com/bid/104162Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1040904Third Party Advisory, VDB Entry
cve@mitre.orghttps://efail.deExploit, Mitigation, Third Party Advisory
cve@mitre.orghttps://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.htmlThird Party Advisory
cve@mitre.orghttps://news.ycombinator.com/item?id=17066419Issue Tracking, Third Party Advisory
cve@mitre.orghttps://protonmail.com/blog/pgp-vulnerability-efailIssue Tracking, Third Party Advisory
cve@mitre.orghttps://twitter.com/matthew_d_green/status/995996706457243648Third Party Advisory
cve@mitre.orghttps://www.patreon.com/posts/cybersecurity-15-18814817Issue Tracking, Third Party Advisory
cve@mitre.orghttps://www.synology.com/support/security/Synology_SA_18_22Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/104162Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1040904Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://efail.deExploit, Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://news.ycombinator.com/item?id=17066419Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://protonmail.com/blog/pgp-vulnerability-efailIssue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://twitter.com/matthew_d_green/status/995996706457243648Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.patreon.com/posts/cybersecurity-15-18814817Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.synology.com/support/security/Synology_SA_18_22Third Party Advisory
Impacted products
Vendor Product Version
apple mail -
apple mail -
bloop airmail -
emclient emclient -
flipdogsolutions maildroid -
freron mailmate -
horde horde_imp -
microsoft outlook 2007
mozilla thunderbird -
postbox-inc postbox -
r2mail2 r2mail2 -
roundcube webmail -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apple:mail:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "217117AE-C16C-4265-A9A9-152D06FCD64E",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apple:mail:-:*:*:*:*:iphone_os:*:*",
              "matchCriteriaId": "081D62F6-B751-4109-B10B-3CF9535B3C12",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:bloop:airmail:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "F389CED1-846A-4807-B8E7-00FBECAA41A0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:emclient:emclient:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "930AFDDA-C32A-45E7-BA6E-5827E59B573B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:flipdogsolutions:maildroid:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "ED2616EA-332D-4D6E-B66C-137A166E181D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:freron:mailmate:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "2C26D918-1548-4A62-BC5C-72DF9168A34E",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:horde:horde_imp:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "FDAD39AA-B9FD-492B-9BDA-57F74F4FABE5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:microsoft:outlook:2007:*:*:*:*:*:*:*",
              "matchCriteriaId": "D789259A-034E-40BB-9DFF-76B3104B212F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:mozilla:thunderbird:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "FF583CDC-DE9E-45AB-9861-CB203BFA8862",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:postbox-inc:postbox:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "C0BA111F-A9FB-457D-818E-412195F9EA0A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:r2mail2:r2mail2:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "19296516-EAD4-4B08-8D9A-5E853C7BEF58",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:roundcube:webmail:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "5010756A-99B8-4C05-9DAC-9BE19B8B6373",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [
    {
      "sourceIdentifier": "cve@mitre.org",
      "tags": [
        "disputed"
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. NOTE: third parties report that this is a problem in applications that mishandle the Modification Detection Code (MDC) feature or accept an obsolete packet type, not a problem in the OpenPGP specification"
    },
    {
      "lang": "es",
      "value": "** EN DISPUTA ** La especificaci\u00f3n OpenPGP permite un ataque malleability-gadget Cipher Feedback Mode (CFB) que puede conducir indirectamente a la exfiltraci\u00f3n en texto plano. Esto tambi\u00e9n se conoce como EFAIL. NOTA: terceros indican que este es un problema en aplicaciones que gestionan de manera incorrecta la caracter\u00edstica de Modification Detection Code (MDC) o que afectan un tipo de paquete obsoleto, en lugar de un problema en la especificaci\u00f3n OpenPGP."
    }
  ],
  "id": "CVE-2017-17688",
  "lastModified": "2026-06-17T01:11:29.613",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2018-05-16T19:29:00.223",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/104162"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securitytracker.com/id/1040904"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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        "Mitigation",
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      ],
      "url": "https://efail.de"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      ],
      "url": "https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      ],
      "url": "https://news.ycombinator.com/item?id=17066419"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://protonmail.com/blog/pgp-vulnerability-efail"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      "url": "https://twitter.com/matthew_d_green/status/995996706457243648"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
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      "url": "https://www.patreon.com/posts/cybersecurity-15-18814817"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      "url": "https://www.synology.com/support/security/Synology_SA_18_22"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    },
    {
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      "tags": [
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
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  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Sightings

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Nomenclature

  • 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.
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