Denial of service in SMB client implementation in Microsoft Windows
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2018-0833 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Improper input validation
EUVDB-ID: #VU10551
Risk: Medium
CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2018-0833
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an error within Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client, when processing SMB requests. A remote attacker can make the vulnerable system to connect to a malicious SMB serverand perform a denial of service attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsWindows: 8.1 - 8.1 RT
Windows Server: 2012 R2
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0833
http://krbtgt.pw/smbv3-null-pointer-dereference-vulnerability/
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. However, proof of concept for this vulnerability is available.
