Samba 4.7.x / 4.8.x / 4.9.x < 4.9.5 / 4.10.0rc < 4.10.0rc4 LDAP Search Expression Denial of Service Vulnerability (CVE-2019-3824)

medium Nessus Plugin ID 122860

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Synopsis

The remote Samba server is potentially affected by a denial of service vulnerability.

Description

The version of Samba running on the remote host is 4.7.x, 4.8.x, 4.9.x < 4.9.5 or 4.10.0rc prior to 4.10.0rc4. It is, therefore, potentially affected by a denial of service (DoS) vulnerability in the LDAP search expression parser due to improper validation. An authenticated, remote attacker can exploit this issue, via a crafted LDAP search expression, to cause the LDAP server process of the Samba Active Directory Domain Controller to stop responding.

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 4.9.5 / 4.10.0rc4 or later.

Plugin Details

Severity: Medium

ID: 122860

File Name: samba_4_10_0_rc4.nasl

Version: 1.3

Type: remote

Family: Misc.

Published: 3/15/2019

Updated: 10/30/2019

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS Score Source: CVE-2019-3824

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:samba:samba

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/6/2019

Vulnerability Publication Date: 3/6/2019

Reference Information

CVE: CVE-2019-3824

BID: 107347

Detections

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