CVE-2018-16841CWE-416

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

Medium · published November 28, 2018

CVSS v3.0
5.7
EPSS
5%
Percentile
91.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.0
5.7 · MEDIUM
Vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.04586 · 91.6th percentile
Weakness
CWE-416 · Use After Free
Published
2018-11-28T14:00Z
EPSS history
Timeline
  • 28 NOV 14:00Z
    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
    cvelistv5