Multiple vulnerabilities in Samba

Published: 2018-03-13

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-1050 CVE-2018-1057
CWE-ID	CWE-20 CWE-284
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	Samba Server applications / Directory software, identity management
Vendor	Samba

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU10949

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-1050

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation when processing RPC requests to the spoolss service. A remote attacker can send a specially crafted RPC request to the affected service and trigger denial of service conditions.

Successful exploitation of the vulnerability requires that the RPC spoolss service services is configured as external daemon.

Mitigation

Apply patch from vendors website.

Vulnerable software versions

Samba: 4.0.0 - 4.7.5

External links

http://www.samba.org/samba/security/CVE-2018-1050.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

2) Improper access control

EUVDB-ID: #VU10951

Risk: Medium

CVSSv3.1: 7.8 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-1057

CWE-ID: CWE-284 - Improper Access Control