Vulnerability identifier: #VU5610
Vulnerability risk: Medium
CVSSv3.1: 9.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-476
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Windows
Operating systems & Components /
Operating system
Windows Server
Operating systems & Components /
Operating system
Vendor: Microsoft
Description
The vulnerability allows a remote attacker to cause denial of service.
The vulnerability exists due to a NULL pointer dereference error when processing Server Message Block (SMB) network traffic. A remote attacker can send specially crafted response, containing too many bytes following the structure defined in the SMB2 TREE_CONNECT Response structure and cause the affected system to crash.
Successful exploitation of the vulnerability may allow an attacker to perform a denial of service (DoS) attack.
Note: the exploit code for this vulnerability is publicly available.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Windows: 8.1, 10
Windows Server: 2012 - 2016
External links
http://www.kb.cert.org/vuls/id/867968
http://github.com/lgandx/PoC/tree/master/SMBv3%20Tree%20Connect
http://technet.microsoft.com/en-us/library/security/MS17-012
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. However, a fully functional exploit for this vulnerability is available.