Plugins Database As of 12-07-2019

Samba AD DC Check Password Script Weakness (CVE-2019-14833)

General
Impact by CVSS Score
  • ID: 1.3.6.1.4.1.25623.1.0.108693

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:N/A:N

Detection Type:
Remote Banner Unreliable

Solution Type:
Vendor Patch

Summary:
When the password contains multi-byte (non-ASCII) characters, the check password script of Samba AD DC does not receive the full password string.

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
Since Samba Version 4.5.0 a Samba AD DC can use a custom command to verify the password complexity. The command can be specified with the 'check password script' smb.conf parameter. This command is called when Samba handles a user password change or a new user password is set. The script receives the new cleartext password string in order to run custom password complexity checks like dictionary checks to avoid weak user passwords. When the password contains multi-byte (non-ASCII) characters, the check password script does not receive the full password string.

Affected Versions:
Samba 4.5.0 and later

Recommendations:
Update to version 4.11.2, 4.10.10, 4.9.15 or later.

Search
Severity
Medium
CVSS Score
5.0
Published
2019-10-30 13:40:29
Modified
2019-10-30 13:54:19
CVE
CVE-2019-14833

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