Rapid7 Vulnerability & Exploit Database

Samba CVE-2018-16841: Double-free in Samba AD DC KDC with PKINIT

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Samba CVE-2018-16841: Double-free in Samba AD DC KDC with PKINIT

Severity
4
CVSS
(AV:N/AC:L/Au:S/C:N/I:N/A:P)
Published
11/28/2018
Created
03/19/2019
Added
12/04/2018
Modified
02/05/2019

Description

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.

Solution(s)

  • samba-upgrade-4_7_12
  • samba-upgrade-4_8_7
  • samba-upgrade-4_9_3

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