mailing list archives
Vulnerability in Microsoft Security Essentials <v4.2
From: "Stefan Kanthak" <stefan.kanthak () nexgo de>
Date: Sat, 4 May 2013 17:42:37 +0200
versions of Microsoft Security Essentials before the current
v4.2 (see <https://support.microsoft.com/kb/2805304>) have a
vulnerability that could lead to execution of arbitrary code
in the security context of the LocalSystem account (almost like
The "UninstallString" written to
[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall\Microsoft Security Client]
"UninstallString"="C:\\Program Files\\Microsoft Security Client\\Setup.exe /X"
contains unquoted spaces.
This command may be called by Windows Update Agent or deployment
agents running under the LocalSystem account.
2012-12-05 vendor informed
2013-12-06 vendor acknowledged report
2013-02-13 vendor released fixed version
- Vulnerability in Microsoft Security Essentials <v4.2 Stefan Kanthak (May 06)