Multiple vulnerabilities in Samba

Published: 2017-11-21

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-14746 CVE-2017-15275
CWE-ID	CWE-416 CWE-401
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) Use-after-free

EUVDB-ID: #VU9372

Risk: Medium

CVSSv3.1: 8.3 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-14746

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a use-after-free error when processing SMB1 requests. A remote attacker can send a specially crafted SMB1 request to vulnerable server, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable SMB server.

Mitigation

Update to version 4.5.15, 4.6.11 or 4.7.3.

Vulnerable software versions

Samba: 4.0.0 - 4.7.2

External links

http://www.samba.org/samba/security/CVE-2017-14746.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) Memory leak

EUVDB-ID: #VU9373