Ubuntu 16.04 LTS / 18.04 LTS / 19.04 / 19.10 : Samba vulnerabilities (USN-4217-1)

medium Nessus Plugin ID 132013

Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

Andreas Oster discovered that the Samba DNS management server incorrectly handled certain records. An authenticated attacker could possibly use this issue to crash Samba, resulting in a denial of service. (CVE-2019-14861)

Isaac Boukris discovered that Samba did not enforce the Kerberos DelegationNotAllowed feature restriction, contrary to expectations.
(CVE-2019-14870).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected libsmbclient and / or samba packages.

See Also

https://usn.ubuntu.com/4217-1/

Plugin Details

Severity: Medium

ID: 132013

File Name: ubuntu_USN-4217-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 12/12/2019

Updated: 9/17/2020

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

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

CVSS Score Source: CVE-2019-14870

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: p-cpe:/a:canonical:ubuntu_linux:libsmbclient, p-cpe:/a:canonical:ubuntu_linux:samba, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:19.04, cpe:/o:canonical:ubuntu_linux:19.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 12/10/2019

Vulnerability Publication Date: 12/10/2019

Reference Information

CVE: CVE-2019-14861, CVE-2019-14870

USN: 4217-1