Windows SMB Server
CVE-2018-0749 — SMB Server Elevation of Privilege Vulnerability
Executive Summary
An elevation of privilege vulnerability exists in the Microsoft Server Message Block (SMB) Server when an attacker with valid credentials attempts to open a specially crafted file over the SMB protocol on the same machine. An attacker who successfully exploited this vulnerability could bypass certain security checks in the operating system. To exploit the vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The update addresses the vulnerability by correcting how Windows SMB Server handles such specially crafted files.
Overview
6.6
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
None
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.9
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
18 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 for 32-bit Systems | 4056893 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 for x64-based Systems | 4056893 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1511 for 32-bit Systems | 4056888 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1511 for x64-based Systems | 4056888 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1607 for 32-bit Systems | 4056890 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1607 for x64-based Systems | 4056890 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1703 for 32-bit Systems | 4056891 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1703 for x64-based Systems | 4056891 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1709 for 32-bit Systems | 4056892 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1709 for x64-based Systems | 4056892 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 7 for 32-bit Systems Service Pack 1 4056894 (Monthly Rollup) 4056897 (Security Only) Important Elevation of Privilege 4054518 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows 7 for x64-based Systems Service Pack 1 4056894 (Monthly Rollup) 4056897 (Security Only) Important Elevation of Privilege 4054518 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows 8.1 for 32-bit systems 4056895 (Monthly Rollup) 4056898 (Security Only) Important Elevation of Privilege 4054519 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows 8.1 for x64-based systems 4056895 (Monthly Rollup) 4056898 (Security Only) Important Elevation of Privilege 4054519 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 | 4056759 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | 4056759 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2008 for Itanium-Based Systems Service Pack 2 | 4056759 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2008 for x64-based Systems Service Pack 2 | 4056759 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | 4056759 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 4056894 (Monthly Rollup) 4056897 (Security Only) Important Elevation of Privilege 4054518 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 4056894 (Monthly Rollup) 4056897 (Security Only) Important Elevation of Privilege 4054518 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4056894 (Monthly Rollup) 4056897 (Security Only) Important Elevation of Privilege 4054518 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 4056896 (Monthly Rollup) 4056899 (Security Only) Important Elevation of Privilege 4054520 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 (Server Core installation) 4056896 (Monthly Rollup) 4056899 (Security Only) Important Elevation of Privilege 4054520 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 4056895 (Monthly Rollup) 4056898 (Security Only) Important Elevation of Privilege 4054519 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 (Server Core installation) 4056895 (Monthly Rollup) 4056898 (Security Only) Important Elevation of Privilege 4054519 Base: 6.6 Temporal: 5.9 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2016 | 4056890 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2016 (Server Core installation) | 4056890 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server, version 1709 (Server Core Installation) | 4056892 (Security Update) |
Important | Elevation of Privilege | Yes |
Patches
6 patches
| Article | Type | Restart |
|---|---|---|
4056893 |
Security Update | Yes |
4056888 |
Security Update | Yes |
4056890 |
Security Update | Yes |
4056891 |
Security Update | Yes |
4056892 |
Security Update | Yes |
4056759 |
Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
James Forshaw of Google Project Zero
References
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