CVE-2018-8307 — WordPad Security Feature Bypass Vulnerability

Executive Summary

A security feature bypass vulnerability exists when Microsoft WordPad improperly handles embedded OLE objects. An attacker who successfully exploited the vulnerability could bypass content blocking. In a file-sharing attack scenario, an attacker could provide a specially crafted document file designed to exploit the vulnerability, and then convince a user to open the document file. The security update addresses the vulnerability by correcting how Microsoft WordPad handles input.

Overview

5.3

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Security Feature Bypass

Released Jul 10 2018

Last Updated Jul 10 2018

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

CVSS Vector

ATTACK VECTOR

Local

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

CONFIDENTIALITY

Low

INTEGRITY

Low

AVAILABILITY

Low

EXPLOIT CODE MATURITY

Proof-of-Concept

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 4.8

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

6 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 for 32-bit Systems 4338829 (Security Update) 4345455 (Alternate Cumulative) Important Security Feature Bypass 4284860 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 10 for x64-based Systems 4338829 (Security Update) 4345455 (Alternate Cumulative) Important Security Feature Bypass 4284860 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 10 Version 1607 for 32-bit Systems 4338814 (Security Update) 4345418 (Alternate Cumulative) Important Security Feature Bypass 4284880 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 10 Version 1607 for x64-based Systems 4338814 (Security Update) 4345418 (Alternate Cumulative) Important Security Feature Bypass 4284880 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 10 Version 1703 for 32-bit Systems 4338826 (Security Update) 4345419 (Alternate Cumulative) Important Security Feature Bypass 4284874 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 10 Version 1703 for x64-based Systems 4338826 (Security Update) 4345419 (Alternate Cumulative) Important Security Feature Bypass 4284874 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 10 Version 1709 for 32-bit Systems 4338825 (Security Update) 4345420 (Alternate Cumulative) Important Security Feature Bypass 4284819 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 10 Version 1709 for x64-based Systems 4338825 (Security Update) 4345420 (Alternate Cumulative) Important Security Feature Bypass 4284819 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 10 Version 1803 for 32-bit Systems 4338819 (Security Update) 4345421 (Alternate Cumulative) Important Security Feature Bypass 4284835 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 10 Version 1803 for x64-based Systems 4338819 (Security Update) 4345421 (Alternate Cumulative) Important Security Feature Bypass 4284835 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 7 for 32-bit Systems Service Pack 1 4338818 (Monthly Rollup) 4338823 (Security Only) 4338821 (Preview Rollup) 4345459 (Standalone) Important Security Feature Bypass 4284826 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 7 for x64-based Systems Service Pack 1 4338818 (Monthly Rollup) 4338823 (Security Only) 4338821 (Preview Rollup) 4345459 (Standalone) Important Security Feature Bypass 4284826 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 8.1 for 32-bit systems 4338815 (Monthly Rollup) 4338824 (Security Only) 4338831 (Preview Rollup) 4345424 (Standalone) Important Security Feature Bypass 4284815 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows 8.1 for x64-based systems 4338815 (Monthly Rollup) 4338824 (Security Only) 4338831 (Preview Rollup) 4345424 (Standalone) Important Security Feature Bypass 4284815 Base: 5.3 Temporal: 4.8 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Yes None Windows RT 8.1	`4338815 (Monthly Rollup)`	Important	Security Feature Bypass	Yes
Windows Server 2008 for 32-bit Systems Service Pack 2	`4339291 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)	`4339291 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2008 for Itanium-Based Systems Service Pack 2	`4339291 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2008 for x64-based Systems Service Pack 2	`4339291 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)	`4339291 (Security Update)`	Important	Security Feature Bypass	Yes

Patches

2 patches

Article	Type	Restart
`4338815`	Monthly Rollup	Yes
`4339291`	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

Eduardo Braun Prado working with Trend Micro's Zero Day Initiative

References

MSRC Advisory MITRE NVD