CVE-2018-0833Windows 8.1 NULL Pointer Dereference
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".
Published Feb 14, 2018 · Updated Nov 21, 2024
Key Facts
Routine patching- CVE-2018-0833 is a medium-severity vulnerability (CVSS 5.3 v3) affecting Windows 8.1 (Microsoft), Windows Rt 8.1 (Microsoft), Windows Server 2012 (Microsoft) and 1 more product.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 40% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.
Scores
CVSS v3
5.3
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
40%
Higher than 98.6% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
42/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
3
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
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".
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 8.1Microsoft | See advisory | n/a |
| Windows Rt 8.1Microsoft | See advisory | n/a |
| Windows Server 2012Microsoft | r2 | n/a |
| Server Message Block | >= Windows 8.1 and RT 8.1 and Windows Server 2012 R2 | n/a |
Timeline
Publicly disclosed
Feb 14, 2018
Last updated
Nov 21, 2024
Weakness Type
- CWE-476 NULL Pointer Dereference
References
- advisory102924
- advisory1040375
- patchportal.msrc.microsoft.com · CVE-2018-0833
- exploitgithub.com · CVE-2018-0833
- exploitExploitDB-44189
FAQ
Common Questions.
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".
Affected: Windows 8.1 (Microsoft); Windows Rt 8.1 (Microsoft); Windows Server 2012 (Microsoft) versions r2, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.
Is CVE-2018-0833 On Your Attack Surface?
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