Debian DSA-3860-1 : samba - security update (SambaCry)

Critical Nessus Plugin ID 100391

Synopsis

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

Description

steelo discovered a remote code execution vulnerability in Samba, a SMB/CIFS file, print, and login server for Unix. A malicious client with access to a writable share, can take advantage of this flaw by uploading a shared library and then cause the server to load and execute it.

Solution

Upgrade the samba packages.

For the stable distribution (jessie), this problem has been fixed in version 2:4.2.14+dfsg-0+deb8u6.

See Also

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

http://www.debian.org/security/2017/dsa-3860

Plugin Details

Severity: Critical

ID: 100391

File Name: debian_DSA-3860.nasl

Version: $Revision: 3.12 $

Type: local

Agent: unix

Published: 2017/05/25

Modified: 2018/01/29

Dependencies: 12634

Risk Information

Risk Factor: Critical

CVSSv2

Base Score: 10

Temporal Score: 8.7

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

Temporal Vector: CVSS2#E:H/RL:OF/RC:ND

CVSSv3

Base Score: 9.8

Temporal Score: 9.4

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

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:X

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: 2017/05/24

Exploitable With

CANVAS (CANVAS)

Core Impact

Metasploit (Samba is_known_pipename() Arbitrary Module Load)

Reference Information

CVE: CVE-2017-7494

OSVDB: 158063

DSA: 3860