CVE-2018-0833 Null dereference in Server Message Block
A null dereference in the Windows SMB client allows attackers to cause a denial of service via specially crafted requests.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-0833?
CVE-2018-0833 is a medium-severity vulnerability in Microsoft Windows 8.1, published on 15 Feb 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client in Windows 8.1 and RT 8.1 and Windows Server 2012 R2 allows a denial of service vulnerability due to how specially crafted requests are handled, aka "SMBv2/SMBv3 Null Dereference Denial of Service Vulnerability".
Weakness: CWE-476
Which versions are affected by CVE-2018-0833?
It affects 3 products.
Products include Microsoft Windows 8.1, Microsoft Windows Rt 8.1, Microsoft Windows Server 2012.
How do I fix CVE-2018-0833?
No fix has been published for CVE-2018-0833 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-0833 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-0833 exists.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Microsoft Windows 8.1
- CVE-2017-0022 Microsoft XML Core Services Information Disclosure
- CVE-2016-3300 Privilege escalation in n/a
- CVE-2016-0044 Denial of service in n/a
- CVE-2015-2361 Memory corruption in n/a
- CVE-2015-0058 Double free vulnerability in win32k.sys in the kernel-mode drivers in Microsoft Windows 8.1, Windows Server 2012 R2, and Windows RT 8.1 allo
Sources
Also known as GHSA-m84f-8362-3v3c.