Debian DSA-3816-1 : samba - security update

medium Nessus Plugin ID 97923
New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it is different from CVSS.

VPR Score: 6.7

Synopsis

The remote Debian host is missing a security-related update.

Description

Jann Horn of Google discovered a time-of-check, time-of-use race condition in Samba, a SMB/CIFS file, print, and login server for Unix.
A malicious client can take advantage of this flaw by exploiting a symlink race to access areas of the server file system not exported under a share definition.

Solution

Upgrade the samba packages.

For the stable distribution (jessie), this problem has been fixed in version 2:4.2.14+dfsg-0+deb8u4.

See Also

https://packages.debian.org/source/jessie/samba

https://www.debian.org/security/2017/dsa-3816

Plugin Details

Severity: Medium

ID: 97923

File Name: debian_DSA-3816.nasl

Version: 3.14

Type: local

Agent: unix

Published: 3/24/2017

Updated: 1/11/2021

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: Medium

VPR Score: 6.7

CVSS v2.0

Base Score: 6

Temporal Score: 4.7

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

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

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:samba, cpe:/o:debian:debian_linux:8.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/23/2017

Reference Information

CVE: CVE-2017-2619

DSA: 3816