Samba 4.x < 4.9.18 / 4.10.x < 4.10.12 / 4.11.x < 4.11.5 Multiple Vulnerabilities

medium Nessus Plugin ID 133210

Synopsis

The remote Samba server is potentially affected by multiple vulnerabilities.

Description

The version of Samba running on the remote host is 4.x prior to 4.9.18, 4.10.x prior to 4.10.12, or 4.11.x prior to 4.11.5. It is, therefore, affected by multiple vulnerabilities:

- An issue exists with ACL inheritance due to added or removed delegated rights not being inherited across domain controllers. An authenticated, remote attacker can exploit this to create or remove a subtree when the permission should have been removed from the user. (CVE-2019-14902)

- A denial of service (DoS) vulnerability exists due to Samba incorrectly converting characters printed during the NTLMSSP exchange when the log level is set to 3. An authenticated, remote attacker can exploit this issue, to cause some long-lived processes like the RPC server to stop responding. (CVE-2019-14907)

- A use-after-free error exists in the code used to 'tombstone' dynamically created DNS records that have reached their expiry time, due to an improper realloc() call. An authenticated, remote attacker may be able to exploit this to cause read memory to be written to the DB. (CVE-2019-19344)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Samba version 4.9.18 / 4.10.12 / 4.11.5 or later.

See Also

https://www.samba.org/samba/security/CVE-2019-14902.html

https://www.samba.org/samba/security/CVE-2019-14907.html

https://www.samba.org/samba/security/CVE-2019-19344.html

Plugin Details

Severity: Medium

ID: 133210

File Name: samba_4_11_5.nasl

Version: 1.4

Type: remote

Family: Misc.

Published: 1/24/2020

Updated: 9/25/2020

Configuration: Enable paranoid mode

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2019-14902

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:samba:samba

Required KB Items: SMB/NativeLanManager, SMB/samba, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 1/21/2020

Vulnerability Publication Date: 1/21/2020

Reference Information

CVE: CVE-2019-14902, CVE-2019-14907, CVE-2019-19344

IAVA: 2020-A-0035-S