Actively exploited · Published Sep 13, 2018 · Assigned by microsoft
CVE-2018-8440
High 7.8 Exploited Ransomware
In plain English
A high-severity security flaw in Windows 10 from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on March 28, 2022). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 18.5% (higher than 97% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code. Apply updates per vendor instructions.
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Apr 18, 2022.
Official description
An elevation of privilege vulnerability exists when Windows improperly handles calls to Advanced Local Procedure Call (ALPC), aka "Windows ALPC Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 7 | 32-bit Systems Service Pack 1x64-based Systems Service Pack 1 |
| Microsoft | Windows Server 2012 R2 | (Server Core installation) |
| Microsoft | Windows RT 8.1 | Windows RT 8.1 |
| Microsoft | Windows Server 2008 | 32-bit Systems Service Pack 232-bit Systems Service Pack 2 (Server Core installation)Itanium-Based Systems Service Pack 2x64-based Systems Service Pack 2x64-based Systems Service Pack 2 (Server Core installation) |
| Microsoft | Windows Server 2012 | (Server Core installation) |
| Microsoft | Windows 8.1 | 32-bit systemsx64-based systems |
| Microsoft | Windows Server 2016 | (Server Core installation) |
| Microsoft | Windows Server 2008 R2 | Itanium-Based Systems Service Pack 1x64-based Systems Service Pack 1x64-based Systems Service Pack 1 (Server Core installation) |
| Microsoft | Windows 10 | 32-bit SystemsVersion 1607 for 32-bit SystemsVersion 1607 for x64-based SystemsVersion 1703 for 32-bit SystemsVersion 1703 for x64-based SystemsVersion 1709 for 32-bit SystemsVersion 1709 for x64-based SystemsVersion 1803 for 32-bit Systems |
| Microsoft | Windows 10 Servers | version 1709 (Server Core Installation)version 1803 (Server Core Installation) |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8440 x_refsource_CONFIRM
- https://blog.0patch.com/2018/09/comparing-our-micropatch-with.html x_refsource_MISC
- https://blog.0patch.com/2018/08/how-we-micropatched-publicly-dropped.html x_refsource_MISC
- 1041578 vdb-entry, x_refsource_SECTRACK
- 105153 vdb-entry, x_refsource_BID
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8440 government-resource