CVE-2018-8476 — Windows Deployment Services TFTP Server Remote Code Execution Vulnerability

Executive Summary

A remote code execution vulnerability exists in the way that Windows Deployment Services TFTP Server handles objects in memory. An attacker who successfully exploited the vulnerability could execute arbitrary code with elevated permissions on a target system. To exploit the vulnerability, an attacker could create a specially crafted request, causing Windows to execute arbitrary code with elevated permissions. The security update addresses the vulnerability by correcting how Windows Deployment Services TFTP Server handles objects in memory.

Overview

8.1

CVSS HIGH

Critical

MS Severity

Not Exploited

MS Exploit Status

More Likely

MS Exploit Likelihood

Category Remote Code Execution

Released Nov 13 2018

Last Updated Nov 13 2018

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

CVSS Vector

ATTACK VECTOR

Network

ATTACK COMPLEXITY

High

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

Temporal Score: 8.1

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

5 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows Server 2008 for 32-bit Systems Service Pack 2 4467706 (Monthly Rollup) 4467700 (Security Only) Critical Remote Code Execution 4463097 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 4467706 (Monthly Rollup) 4467700 (Security Only) Critical Remote Code Execution 4463097 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2008 for Itanium-Based Systems Service Pack 2 4467706 (Monthly Rollup) 4467700 (Security Only) Critical Remote Code Execution 4463097 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2008 for x64-based Systems Service Pack 2 4467706 (Monthly Rollup) 4467700 (Security Only) Critical Remote Code Execution 4463097 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 4467706 (Monthly Rollup) 4467700 (Security Only) Critical Remote Code Execution 4463097 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 4467107 (Monthly Rollup) 4467106 (Security Only) Critical Remote Code Execution 4462923 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 4467107 (Monthly Rollup) 4467106 (Security Only) Critical Remote Code Execution 4462923 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4467107 (Monthly Rollup) 4467106 (Security Only) Critical Remote Code Execution 4462923 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2012 4467701 (Monthly Rollup) 4467678 (Security Only) Critical Remote Code Execution 4462929 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2012 (Server Core installation) 4467701 (Monthly Rollup) 4467678 (Security Only) Critical Remote Code Execution 4462929 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2012 R2 4467697 (Monthly Rollup) 4467703 (Security Only) Critical Remote Code Execution 4462926 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2012 R2 (Server Core installation) 4467697 (Monthly Rollup) 4467703 (Security Only) Critical Remote Code Execution 4462926 Base: 8.1 Temporal: 8.1 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Yes None Windows Server 2016	`4467691 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2016 (Server Core installation)	`4467691 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2019	`4467708 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2019 (Server Core installation)	`4467708 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server, version 1803 (Server Core Installation)	`4467702 (Security Update)`	Critical	Remote Code Execution	Yes

Patches

3 patches

Article	Type	Restart
`4467691`	Security Update	Yes
`4467708`	Security Update	Yes
`4467702`	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

Omer Gull of Checkpoint Software Technologies

References

MSRC Advisory MITRE NVD