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Ubuntu 19.04 : samba vulnerability (USN-4121-1)

critical Nessus Plugin ID 128507

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Synopsis

The remote Ubuntu host is missing a security-related patch.

Description

Stefan Metzmacher discovered that the Samba SMB server did not properly prevent clients from escaping outside the share root directory in some situations. An attacker could use this to gain access to files outside of the Samba share, where allowed by the permissions of the underlying filesystem.

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 samba package.

See Also

https://usn.ubuntu.com/4121-1/

Plugin Details

Severity: Critical

ID: 128507

File Name: ubuntu_USN-4121-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 9/4/2019

Updated: 5/11/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:samba, cpe:/o:canonical:ubuntu_linux:19.04

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/3/2019

Vulnerability Publication Date: 9/3/2019

Reference Information

CVE: CVE-2019-10197

USN: 4121-1