fkie_cve-2018-16841
Vulnerability from fkie_nvd
Published
2018-11-28 14:29
Modified
2024-11-21 03:53
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba's KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process.
References
secalert@redhat.comhttp://www.securityfocus.com/bid/106023Third Party Advisory, VDB Entry
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://security.gentoo.org/glsa/202003-52Third Party Advisory
secalert@redhat.comhttps://security.netapp.com/advisory/ntap-20181127-0001/Third Party Advisory
secalert@redhat.comhttps://usn.ubuntu.com/3827-1/Third Party Advisory
secalert@redhat.comhttps://usn.ubuntu.com/3827-2/Third Party Advisory
secalert@redhat.comhttps://www.debian.org/security/2018/dsa-4345Third Party Advisory
secalert@redhat.comhttps://www.samba.org/samba/security/CVE-2018-16841.htmlPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/106023Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202003-52Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20181127-0001/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3827-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3827-2/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2018/dsa-4345Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.samba.org/samba/security/CVE-2018-16841.htmlPatch, Vendor Advisory
Impacted products
Vendor Product Version
samba samba *
samba samba *
samba samba *
canonical ubuntu_linux 12.04
canonical ubuntu_linux 14.04
canonical ubuntu_linux 16.04
canonical ubuntu_linux 18.04
canonical ubuntu_linux 18.10
debian debian_linux 9.0


To clipboard 

{
  "configurations": [
    {
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba\u0027s KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process."
    },
    {
      "lang": "es",
      "value": "Samba, desde la versi\u00f3n 4.3.0 antes de las versiones 4.7.12, 4.8.7 y 4.9.3, es vulnerable a una denegaci\u00f3n de servicio (DoS). Cuando se configura para aceptar la autenticaci\u00f3n por smartcard, el KDC de Samba llamar\u00e1 a talloc_free() dos veces en la misma memoria si la entidad de seguridad en un certificado firmado de forma v\u00e1lida no coincide con la entidad en AS-REQ. Esto solo es posible tras la autenticaci\u00f3n con un certificado de confianza. talloc es resistente a corrupci\u00f3n de una doble liberaci\u00f3n (double free) con talloc_free() y llama directamente a abort(), terminando el proceso KDC."
    }
  ],
  "id": "CVE-2018-16841",
  "lastModified": "2024-11-21T03:53:25.367",
  "metrics": {
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        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
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          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
          "version": "2.0"
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        "exploitabilityScore": 8.0,
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        "obtainAllPrivilege": false,
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  "published": "2018-11-28T14:29:00.347",
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}


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