CVE-2018-8440
CVE-2018-8440
Vexday Risk Score
91Fix now
SSVC decision (CISA)
Act
Exploitation + impact → act immediately
CVSS 7.8EPSS 18.4%KEV simPoC públicaNuclei —Metasploit simPatch —
Lifecycle
27 Aug 2018Metasploit module available
13 Sep 2018Published on NVD
31 Oct 2018Public PoC
28 Mar 2022Active exploitation (CISA KEV)
Recommendation: Patch as soon as possible — active exploitation confirmed.
In short
Windows has a flaw in how it handles ALPC (Advanced Local Procedure Call) that allows a user with limited permissions to gain higher-level access on the system. This is dangerous because it lets attackers escalate their privileges and take control of the computer.
Technical detail
An elevation of privilege vulnerability in Windows ALPC handling allows a local, authenticated attacker to escalate privileges to system or administrator level through improper validation of ALPC calls. Requires local access and user-level credentials; successful exploitation grants unrestricted system access.
Summary generated and translated by AI from the 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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Microsoft · Windows 10Microsoft · Windows 10 ServersMicrosoft · Windows 7Microsoft · Windows 8.1Microsoft · Windows RT 8.1Microsoft · Windows Server 2008Microsoft · Windows Server 2008 R2Microsoft · Windows Server 2012Microsoft · Windows Server 2012 R2Microsoft · Windows Server 2016public PoCs found — 1
githubgithub.com/sourceincite/CVE-2018-8440★ 80⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://blog.0patch.com/2018/08/how-we-micropatched-publicly-dropped.htmlhttps://blog.0patch.com/2018/09/comparing-our-micropatch-with.htmlhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8440https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8440http://www.securityfocus.com/bid/105153http://www.securitytracker.com/id/1041578