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CVE-2018-16841 (GCVE-0-2018-16841)

Vulnerability from cvelistv5 – Published: 2018-11-28 14:00 – Updated: 2024-08-05 10:32
VLAI
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.
Severity
5.7 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
CWE
Assigner
References
URL Tags
http://www.securityfocus.com/bid/106023 vdb-entryx_refsource_BID
https://usn.ubuntu.com/3827-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3827-1/ vendor-advisoryx_refsource_UBUNTU
https://security.netapp.com/advisory/ntap-2018112… x_refsource_CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
https://www.debian.org/security/2018/dsa-4345 vendor-advisoryx_refsource_DEBIAN
https://www.samba.org/samba/security/CVE-2018-168… x_refsource_CONFIRM
https://security.gentoo.org/glsa/202003-52 vendor-advisoryx_refsource_GENTOO
Impacted products
Vendor Product Version CPE status
[UNKNOWN] samba Affected: 4.7.12
Affected: 4.8.7
Affected: 4.9.3
guessed Create a notification for this product.
Date Public
2018-11-28 00:00
Show details on NVD website
To clipboard 

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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "samba: Double-free in Samba AD DC KDC with PKINIT",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-16841.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.
  • 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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.