FKIE_CVE-2017-11103

Vulnerability from fkie_nvd - Published: 2017-07-13 13:29 - Updated: 2026-06-17 01:01
Severity
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service-principal names in a way that violates the Kerberos 5 protocol specification. In _krb5_extract_ticket() the KDC-REP service name must be obtained from the encrypted version stored in 'enc_part' instead of the unencrypted version stored in 'ticket'. Use of the unencrypted version provides an opportunity for successful server impersonation and other attacks. NOTE: this CVE is only for Heimdal and other products that embed Heimdal code; it does not apply to other instances in which this part of the Kerberos 5 protocol specification is violated.
References
cve@mitre.orghttp://www.debian.org/security/2017/dsa-3912Third Party Advisory
cve@mitre.orghttp://www.h5l.org/advisories.html?show=2017-07-11Broken Link
cve@mitre.orghttp://www.securityfocus.com/bid/99551Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1038876Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1039427Third Party Advisory, VDB Entry
cve@mitre.orghttps://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0Release Notes
cve@mitre.orghttps://support.apple.com/HT208112Third Party Advisory
cve@mitre.orghttps://support.apple.com/HT208144Third Party Advisory
cve@mitre.orghttps://support.apple.com/HT208221Third Party Advisory
cve@mitre.orghttps://www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.ascThird Party Advisory
cve@mitre.orghttps://www.orpheus-lyre.info/Third Party Advisory
cve@mitre.orghttps://www.samba.org/samba/security/CVE-2017-11103.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2017/dsa-3912Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.h5l.org/advisories.html?show=2017-07-11Broken Link
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/99551Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1038876Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1039427Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0Release Notes
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/HT208112Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/HT208144Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/HT208221Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.ascThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.orpheus-lyre.info/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.samba.org/samba/security/CVE-2017-11103.htmlThird Party Advisory
Impacted products
Vendor Product Version
heimdal_project heimdal *
freebsd freebsd -
samba samba *
samba samba *
samba samba *
apple iphone_os *
apple mac_os_x *
debian debian_linux 8.0
debian debian_linux 9.0
debian debian_linux 10.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus\u0027 Lyre attacks because it obtains service-principal names in a way that violates the Kerberos 5 protocol specification. In _krb5_extract_ticket() the KDC-REP service name must be obtained from the encrypted version stored in \u0027enc_part\u0027 instead of the unencrypted version stored in \u0027ticket\u0027. Use of the unencrypted version provides an opportunity for successful server impersonation and other attacks. NOTE: this CVE is only for Heimdal and other products that embed Heimdal code; it does not apply to other instances in which this part of the Kerberos 5 protocol specification is violated."
    },
    {
      "lang": "es",
      "value": "Heimdal en versiones anteriores a la 7.4 permite que atacantes remotos suplanten servicios con ataques Orpheus\u0027 Lyre ya que obtiene nombres de servicios principales, de manera que viola la especificaci\u00f3n del protocolo Kerberos 5. En _krb5_extract_ticket() el nombre del servicio KDC-REP se debe obtener de la versi\u00f3n cifrada almacenada en \u0027enc_part\u0027 en lugar de la versi\u00f3n sin cifrar almacenada en \u0027ticket\u0027. El uso de versiones sin cifrar supone una oportunidad para que se lleve a cabo una suplantaci\u00f3n del servidor exitosa adem\u00e1s de otros ataques. NOTA: este CVE solo es aplicable a Heimdal y otros productos que embeben c\u00f3digo Heimdal."
    }
  ],
  "id": "CVE-2017-11103",
  "lastModified": "2026-06-17T01:01:13.380",
  "metrics": {
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      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
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    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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    ]
  },
  "published": "2017-07-13T13:29:00.173",
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      "source": "cve@mitre.org",
      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-345"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}



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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.
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