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Windows SMB Server

CVE-2018-8335 — Windows SMB Denial of Service Vulnerability

Important CVSS 4.8 2018-09 archive

Executive Summary

A denial of service vulnerability exists in the Microsoft Server Block Message (SMB) when an attacker sends specially crafted requests to the server. An attacker who exploited this vulnerability could cause the affected system to crash. To attempt to exploit this issue, an attacker would need to send specially crafted SMB requests to the target system. Note that the denial of service vulnerability would not allow an attacker to execute code or to elevate their user rights, but it could cause the affected system to stop accepting requests. The security update addresses the vulnerability by correcting the manner in which SMB handles specially crafted client requests.

Overview

4.8
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Denial of Service
Released Sep 11 2018
Last Updated Sep 11 2018
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known

CVSS Vector

ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
Low
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
Temporal Score: 4.8

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

15 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 4457132 (Security Update) Important Denial of Service Yes
Windows 10 for x64-based Systems 4457132 (Security Update) Important Denial of Service Yes
Windows 10 Version 1607 for 32-bit Systems 4457131 (Security Update) Important Denial of Service Yes
Windows 10 Version 1607 for x64-based Systems 4457131 (Security Update) Important Denial of Service Yes
Windows 10 Version 1703 for 32-bit Systems 4457138 (Security Update) Important Denial of Service Yes
Windows 10 Version 1703 for x64-based Systems 4457138 (Security Update) Important Denial of Service Yes
Windows 10 Version 1709 for 32-bit Systems 4457142 (Security Update) Important Denial of Service Yes
Windows 10 Version 1709 for x64-based Systems 4457142 (Security Update) Important Denial of Service Yes
Windows 10 Version 1803 for 32-bit Systems 4457128 (Security Update) Important Denial of Service Yes
Windows 10 Version 1803 for x64-based Systems 4457128 (Security Update) Important Denial of Service Yes
Windows 8.1 for 32-bit systems 4457129 (Monthly Rollup) 4457143 (Security Only) Important Denial of Service 4343898 Base: 4.8 Temporal: 4.8 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H Yes None Windows 8.1 for x64-based systems 4457129 (Monthly Rollup) 4457143 (Security Only) Important Denial of Service 4343898 Base: 4.8 Temporal: 4.8 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H Yes None Windows RT 8.1 4457129 (Monthly Rollup) Important Denial of Service Yes
Windows Server 2012 4457135 (Monthly Rollup) 4457140 (Security Only) Important Denial of Service 4343901 Base: 4.8 Temporal: 4.8 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H Yes None Windows Server 2012 (Server Core installation) 4457135 (Monthly Rollup) 4457140 (Security Only) Important Denial of Service 4343901 Base: 4.8 Temporal: 4.8 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H Yes None Windows Server 2012 R2 4457129 (Monthly Rollup) 4457143 (Security Only) Important Denial of Service 4343898 Base: 4.8 Temporal: 4.8 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H Yes None Windows Server 2012 R2 (Server Core installation) 4457129 (Monthly Rollup) 4457143 (Security Only) Important Denial of Service 4343898 Base: 4.8 Temporal: 4.8 Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H Yes None Windows Server 2016 4457131 (Security Update) Important Denial of Service Yes
Windows Server 2016 (Server Core installation) 4457131 (Security Update) Important Denial of Service Yes
Windows Server, version 1709 (Server Core Installation) 4457142 (Security Update) Important Denial of Service Yes
Windows Server, version 1803 (Server Core Installation) 4457128 (Security Update) Important Denial of Service Yes

Patches

6 patches
Article Type Restart
4457132 Security Update Yes
4457131 Security Update Yes
4457138 Security Update Yes
4457142 Security Update Yes
4457128 Security Update Yes
4457129 Monthly Rollup Yes

Known Exploits

Acknowledgments

Peter Hlavaty @zer0mem

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