Vulnerability identifier: #VU236

Vulnerability risk: Medium

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2111

CWE-ID: CWE-290

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Samba
Server applications / Directory software, identity management
Oracle Solaris
Operating systems & Components / Operating system
Oracle Linux
Operating systems & Components / Operating system

Vendor: Samba
Oracle

Description
The vulnerability allows a remote attacker to to conduct spoofing attacks.

The vulnerability exists due to an error in the NETLOGON service when a Domain Controller is configured. A remote unauthenticated attacker can conduct spoofing attacks by using a specially crafted application to connect to another domain joined system and access session-related information of the spoofed computer.

Successful exploitation of this vulnerability may result in disclosure of user information.

Mitigation
Install Samba 4.4.2, 4.3.8 and 4.2.11

Vulnerable software versions

Samba: 3.0.0, 3.6.0, 3.2.0, 4.0.0

Oracle Solaris: 10 - 11.3

Oracle Linux: 5 - 7

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External links
http://www-01.ibm.com/support/docview.wss?uid=swg21986595
http://www.samba.org/samba/security/CVE-2016-2111.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.