CVE-2018-0986
published 2018-04-04CVE-2018-0986: A remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly scan a specially crafted file, leading to memory…
PriorityP188high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
ITWEXPLOITVulnCheck KEVRansomware
Exploited in the wild
EPSS
61.48%
99.1th percentile
A remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly scan a specially crafted file, leading to memory corruption, aka "Microsoft Malware Protection Engine Remote Code Execution Vulnerability." This affects Windows Defender, Windows Intune Endpoint Protection, Microsoft Security Essentials, Microsoft System Center Endpoint Protection, Microsoft Exchange Server, Microsoft System Center, Microsoft Forefront Endpoint Protection.
Affected
67 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | exchange_server | — | — |
| microsoft | exchange_server | — | — |
| microsoft | microsoft_exchange_server | — | — |
| microsoft | microsoft_exchange_server | — | — |
| microsoft | microsoft_forefront_endpoint_protection | — | — |
| microsoft | microsoft_security_essentials | — | — |
| microsoft | microsoft_system_center | — | — |
| microsoft | microsoft_system_center | — | — |
| microsoft | microsoft_system_center_endpoint_protection | — | — |
| microsoft | system_center_endpoint_protection | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
| microsoft | windows_defender | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Trigger condition: a specially crafted RAR file processed by mpengine.dll's VMSF_RGB filter with PosR=-2 and DataSize=1 causes an out-of-bounds write (memory corruption/crash). Monitor Windows Defender scan crashes or mpengine.dll faults as a detection signal. ↗
- →The vulnerable code path is in RarVM::ExecuteStandardFilter, specifically the VMSF_RGB case within mpengine.dll's RAR archive processing. Detections should focus on malformed RAR files triggering this filter. ↗
- →Exploitation requires no user interaction when Windows Defender real-time protection is enabled — any file delivered via email, IM, web download, or shared upload that is scanned by MMPE can trigger the vulnerability automatically. ↗
- →Verify mpengine.dll version on endpoints; any version at or below 1.1.14600.4 is vulnerable. Use Nessus Plugin ID 108813 to identify unpatched systems. ↗
- →The exploit abuses the VMSF_UPCASE filter path still present in mpengine.dll's forked unrar code (derived from unrar ≤ 4.2.4), which was removed in unrar 5.0. Presence of VMSF_RGB/VMSF_UPCASE processing in RAR VM execution is the attack surface. ↗
- ·Exploitation is fully automatic (zero-click) only when Windows Defender real-time protection is enabled. If real-time scanning is disabled, exploitation is deferred until a scheduled scan runs. ↗
- ·Successful exploitation grants code execution as LocalSystem, the highest local privilege level, not just the user context. ↗
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.09.3CRITICALAV:N/AC:M/Au:N/C:C/I:C/A:C
vulncheck8.8HIGH
vendor_msrc9.1CRITICAL
CVEs like this are exactly what “Exploited This Week” covers.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Microsoft
Microsoft Exchange Server Remote Code Execution Vulnerability
vendor_msrc·2021-03-09·CVSS 7.8
CVE-2021-26857 [CRITICAL] Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
FAQ: Is this vulnerability being used in an active attack?
Yes. The vulnerability described in this CVE is one of four vulnerabilities that are being exploited in an active attack. The security updates address this attack. More information can be found here: https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server.
What is the target for this attack?
The initial attack in this attack chain targets an Exchange On-prem server that is able to receive untrusted connections from an external source. In addition, the Exchange server would need to be running Microsoft Exchange Server 2013, 2016, or 2019.
Where can I get more information about how to protect myself from the vulnerabilities?
Pleas
Microsoft
Microsoft Exchange Server Remote Code Execution Vulnerability
vendor_msrc·2021-03-09·CVSS 9.1
CVE-2021-26855 [CRITICAL] Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
FAQ: Is this vulnerability being used in an active attack?
Yes. The vulnerability described in this CVE is one of four vulnerabilities that are being exploited in an active attack. The security updates address this attack. More information can be found here: https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server.
What is the target for this attack?
The initial attack in this attack chain targets an Exchange On-prem server that is able to receive untrusted connections from an external source. In addition, the Exchange server would need to be running Microsoft Exchange Server 2013, 2016, or 2019.
Where can I get more information about how to protect myself from the vulnerabilities?
Pleas
Microsoft
Microsoft Exchange Server Remote Code Execution Vulnerability
vendor_msrc·2021-03-09·CVSS 7.8
CVE-2021-27065 [CRITICAL] Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
FAQ: Is this vulnerability being used in an active attack?
Yes. The vulnerability described in this CVE is one of four vulnerabilities that are being exploited in an active attack. The security updates address this attack. More information can be found here: https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server.
What is the target for this attack?
The initial attack in this attack chain targets an Exchange On-prem server that is able to receive untrusted connections from an external source. In addition, the Exchange server would need to be running Microsoft Exchange Server 2013, 2016, or 2019.
Where can I get more information about how to protect myself from the vulnerabilities?
Pleas
Microsoft
Microsoft Exchange Server Remote Code Execution Vulnerability
vendor_msrc·2021-03-09·CVSS 7.8
CVE-2021-26858 [CRITICAL] Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
FAQ: Is this vulnerability being used in an active attack?
Yes. The vulnerability described in this CVE is one of four vulnerabilities that are being exploited in an active attack. The security updates address this attack. More information can be found here: https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server.
What is the target for this attack?
The initial attack in this attack chain targets an Exchange On-prem server that is able to receive untrusted connections from an external source. In addition, the Exchange server would need to be running Microsoft Exchange Server 2013, 2016, or 2019.
Where can I get more information about how to protect myself from the vulnerabilities?
Pleas
Microsoft
Microsoft Malware Protection Engine Remote Code Execution Vulnerability
vendor_msrc·2018-04-10·CVSS 8.8
CVE-2018-0986 [HIGH] Microsoft Malware Protection Engine Remote Code Execution Vulnerability
Microsoft Malware Protection Engine Remote Code Execution Vulnerability
Description: A remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly scan a specially crafted file, leading to memory corruption. An attacker who successfully exploited this vulnerability could execute arbitrary code in the security context of the LocalSystem account and take control of the system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
To exploit this vulnerability, a specially crafted file must be scanned by an affected version of the Microsoft Malware Protection Engine. There are many ways that an attacker could place a specially crafted file in a location that is scanned by the Microsof
GHSA
GHSA-v2gp-f824-rv7r: A remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly scan a specially crafted file, leading to
ghsa_unreviewed·2022-05-13
CVE-2018-0986 [HIGH] CWE-787 GHSA-v2gp-f824-rv7r: A remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly scan a specially crafted file, leading to
A remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly scan a specially crafted file, leading to memory corruption, aka "Microsoft Malware Protection Engine Remote Code Execution Vulnerability." This affects Windows Defender, Windows Intune Endpoint Protection, Microsoft Security Essentials, Microsoft System Center Endpoint Protection, Microsoft Exchange Server, Microsoft System Center, Microsoft Forefront Endpoint Protection.
VulnCheck
Microsoft Exchange Server Out-of-bounds Write
vulncheck·2018·CVSS 8.8
CVE-2018-0986 [HIGH] Microsoft Exchange Server Out-of-bounds Write
Microsoft Exchange Server Out-of-bounds Write
A remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly scan a specially crafted file, leading to memory corruption, aka "Microsoft Malware Protection Engine Remote Code Execution Vulnerability." This affects Windows Defender, Windows Intune Endpoint Protection, Microsoft Security Essentials, Microsoft System Center Endpoint Protection, Microsoft Exchange Server, Microsoft System Center, Microsoft Forefront Endpoint Protection.
Affected: Microsoft Exchange Server
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Known Ransomware Campaign Use: Known
Exploitation References: https://www
No detection rules found.
Trendmicro
Microsoft Fixes Vulnerabilities in Fonts and Keyboard
blogs_trendmicro·2018-04-11·CVSS 5.3
[MEDIUM] Microsoft Fixes Vulnerabilities in Fonts and Keyboard
Exploits & Vulnerabilities
## Microsoft Fixes Vulnerabilities in Fonts and Keyboard
Microsof's Patch Tuesday for April addressed security issues in Internet Explorer (IE), Edge, ChakraCore, Visual Studio, Microsoft Office and Office Services and Web Apps, and Malware Protection Engine.
By: IoT Reputation Service Team 2018/04/11 Read time: ( words)
Save to Folio
Microsoft has rolled out its Patch Tuesday for April to address security issues in Internet Explorer (IE), Edge, ChakraCore, Visual Studio, Microsoft Office and Office Services and Web Apps, and Malware Protection Engine. Of the 67 listed vulnerabilities, 24 were rated critical. Eight of these were disclosed through Trend Micro’s ZDI program:
CVE-2018-1011
CVE-2018-1008
CVE-2018-1004
CVE-2018-1001
CVE-2018-1000
CVE-2018-0
Trendmicro
Microsoft Fixes Vulnerabilities in Fonts and Keyboard
blogs_trendmicro·2018-04-11·CVSS 5.3
[MEDIUM] Microsoft Fixes Vulnerabilities in Fonts and Keyboard
Exploits & Vulnerabilities
# Microsoft Fixes Vulnerabilities in Fonts and Keyboard
Microsof's Patch Tuesday for April addressed security issues in Internet Explorer (IE), Edge, ChakraCore, Visual Studio, Microsoft Office and Office Services and Web Apps, and Malware Protection Engine.
By: IoT Reputation Service Team
2018/04/11
Read time: ( words)
Save to Folio
Microsoft has rolled out its Patch Tuesday for April to address security issues in Internet Explorer (IE), Edge, ChakraCore, Visual Studio, Microsoft Office and Office Services and Web Apps, and Malware Protection Engine. Of the 67 listed vulnerabilities, 24 were rated critical. Eight of these were disclosed through Trend Micro’s ZDI program:
- CVE-2018-1011
- CVE-2018-1008
- CVE-2018-1004
- CVE-2018-1001
- CVE-2018-1000
- CVE
Trendmicro
Microsoft Fixes Vulnerabilities in Fonts and Keyboard
blogs_trendmicro·2018-04-11·CVSS 5.3
[MEDIUM] Microsoft Fixes Vulnerabilities in Fonts and Keyboard
Exploits & Vulnerabilities
## Microsoft Fixes Vulnerabilities in Fonts and Keyboard
Microsof's Patch Tuesday for April addressed security issues in Internet Explorer (IE), Edge, ChakraCore, Visual Studio, Microsoft Office and Office Services and Web Apps, and Malware Protection Engine.
By: IoT Reputation Service Team Apr 11, 2018 Read time: ( words)
Save to Folio
Microsoft has rolled out its Patch Tuesday for April to address security issues in Internet Explorer (IE), Edge, ChakraCore, Visual Studio, Microsoft Office and Office Services and Web Apps, and Malware Protection Engine. Of the 67 listed vulnerabilities, 24 were rated critical. Eight of these were disclosed through Trend Micro’s ZDI program:
CVE-2018-1011
CVE-2018-1008
CVE-2018-1004
CVE-2018-1001
CVE-2018-1000
CVE-2018
Trendmicro
Microsoft Fixes Vulnerabilities in Fonts and Keyboard
blogs_trendmicro·2018-04-11·CVSS 5.3
[MEDIUM] Microsoft Fixes Vulnerabilities in Fonts and Keyboard
Ausnutzung von Schwachstellen
## Microsoft Fixes Vulnerabilities in Fonts and Keyboard
Microsof's Patch Tuesday for April addressed security issues in Internet Explorer (IE), Edge, ChakraCore, Visual Studio, Microsoft Office and Office Services and Web Apps, and Malware Protection Engine.
By: IoT Reputation Service Team Apr 11, 2018 Read time: ( words)
Save to Folio
Microsoft has rolled out its Patch Tuesday for April to address security issues in Internet Explorer (IE), Edge, ChakraCore, Visual Studio, Microsoft Office and Office Services and Web Apps, and Malware Protection Engine. Of the 67 listed vulnerabilities, 24 were rated critical. Eight of these were disclosed through Trend Micro’s ZDI program:
CVE-2018-1011
CVE-2018-1008
CVE-2018-1004
CVE-2018-1001
CVE-2018-1000
CVE-2
Trendmicro
Microsoft Fixes Vulnerabilities in Fonts and Keyboard
blogs_trendmicro·2018-04-11·CVSS 5.3
[MEDIUM] Microsoft Fixes Vulnerabilities in Fonts and Keyboard
Exploits y vulnerabilidades
## Microsoft Fixes Vulnerabilities in Fonts and Keyboard
Microsof's Patch Tuesday for April addressed security issues in Internet Explorer (IE), Edge, ChakraCore, Visual Studio, Microsoft Office and Office Services and Web Apps, and Malware Protection Engine.
By: IoT Reputation Service Team Apr 11, 2018 Read time: ( words)
Save to Folio
Microsoft has rolled out its Patch Tuesday for April to address security issues in Internet Explorer (IE), Edge, ChakraCore, Visual Studio, Microsoft Office and Office Services and Web Apps, and Malware Protection Engine. Of the 67 listed vulnerabilities, 24 were rated critical. Eight of these were disclosed through Trend Micro’s ZDI program:
CVE-2018-1011
CVE-2018-1008
CVE-2018-1004
CVE-2018-1001
CVE-2018-1000
CVE-201
Talos
Microsoft Patch Tuesday - April 2018
blogs_talos·2018-04-10·CVSS 7.5
[HIGH] Microsoft Patch Tuesday - April 2018
## Microsoft Patch Tuesday - April 2018
## Microsoft Patch Tuesday - April 2018 Today, Microsoft has released its monthly set of security advisories for vulnerabilities that have been identified and addressed in various products. This month's advisory release addresses 65 new vulnerabilities and one advisory, with 25 of them rated critical, 39 of them rated important and one of them rated moderate. These vulnerabilities impact Microsoft Windows, Internet Explorer, Microsoft Edge, Microsoft Office, Windows kernel, Windows Hyper-V, Microsoft Scripting Engine and more.
In addition, an update for Adobe Flash Player was released.
## Critical Vulnerabilities This month, Microsoft is addressing 25 vulnerabilities that are rated "critical".
The vulnerabilities rated as "critical" are listed be
Talos
Microsoft Patch Tuesday - April 2018
blogs_talos·2018-04-10·CVSS 7.5
[HIGH] Microsoft Patch Tuesday - April 2018
## Microsoft Patch Tuesday - April 2018Today, Microsoft has released its monthly set of security advisories for vulnerabilities that have been identified and addressed in various products. This month's advisory release addresses 65 new vulnerabilities and one advisory, with 25 of them rated critical, 39 of them rated important and one of them rated moderate. These vulnerabilities impact Microsoft Windows, Internet Explorer, Microsoft Edge, Microsoft Office, Windows kernel, Windows Hyper-V, Microsoft Scripting Engine and more.
In addition, an update for Adobe Flash Player was released.
### Critical VulnerabilitiesThis month, Microsoft is addressing 25 vulnerabilities that are rated "critical".
The vulnerabilities rated as "critical" are listed below:
CVE-2018-0870 - Internet Explorer Me
Tenable
Microsoft Defends Windows Defender from Remote Code Execution: CVE-2018-0986
blogs_tenable·2018-04-06·CVSS 8.8
[HIGH] Microsoft Defends Windows Defender from Remote Code Execution: CVE-2018-0986
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Tenable
Microsoft Defends Windows Defender from Remote Code Execution: CVE-2018-0986
blogs_tenable·2018-04-06·CVSS 8.8
CVE-2018-0986 [HIGH] Microsoft Defends Windows Defender from Remote Code Execution: CVE-2018-0986
Blog / Research
Subscribe
# Microsoft Defends Windows Defender from Remote Code Execution: CVE-2018-0986
Steve Tilson
April 6, 2018
3 Min Read
Over the years, Microsoft has developed an anti-virus and anti-malware suite of security tools for the Windows environment. However, recently, a critical flaw has been found, which affects Microsoft Malware Protection Engine, or mpengine.dll, the core of Windows Defender in all Windows Defender supported versions of Windows and Windows Server.
According to Microsoft, “a remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly scan a specially crafted file, leading to memory corruption. An attacker who successfully exploited this vulnerability could execute arbitrary code in the security context
http://www.securityfocus.com/bid/103593http://www.securitytracker.com/id/1040631https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0986https://www.exploit-db.com/exploits/44402/http://www.securityfocus.com/bid/103593http://www.securitytracker.com/id/1040631https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0986https://www.exploit-db.com/exploits/44402/
2018-04-04
Published
Exploited in the wild