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win-task.txt

win-task.txt
Posted Jun 14, 2006
Site pandora-security.com

In Windows XP, the task scheduler service runs as "SYSTEM", so if an ordinary user has access to the scheduler they can become an administrator.

tags | advisory
systems | windows
SHA-256 | 29173531c65d43e6210eaaddd378d2be9ca201c234205f2d657fb81b27385a41

win-task.txt

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= Advisory: Windows XP Task Scheduler Local Privilege Escalation
=
= Author: Daniel Hückmann (zipk0der) zipk0der@pandora-security.com
=
= Released at: http://www.pandora-security.com
=
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1. Overview.

In Windows XP, the task scheduler service runs as "SYSTEM" (local service);
this is akin to running cron as root. Any processes spawned by the
task scheduler
inherit "SYSTEM" permissions. Using command line tools, we can kill the Windows
desktop (explorer.exe) and restart it running under "SYSTEM". Once running under
"SYSTEM" we have full control of the machine, and can do things even
Administrators
can't. Also included is a recommended fix. Read the full paper at the
link below.

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Direct link to the original paper discussing this issue in detail...

http://www.pandora-security.com/forum/viewtopic.php?t=2093

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Sincerely,

Daniel Hückmann - R&D Director, Pandora Security
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