full-disclosure - Privilege Scalation for Windows Networks using weak Service restrictions v2.0 exploit

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Date: Sun Feb 12 23:20:02 2006
From: atarasco at gmail.com (Andres Tarasco)
Subject: Privilege Scalation for Windows Networks using
	weak Service restrictions v2.0 exploit

Hi,

Not all windows versions are affected. The services listed below have been
found on several pen-tests.

As far as i know, the only way to know if you system is vulnerable to this
issue, is testing it with srvcheck because i have found win2k server boxes,
with all patches, with more than 20 vulnerable services. Why? maybe admins..
maybe an old FAT32 file system...

If your computer has a vulnerable service, just deploy an administrative
template (.inf) with the right permissions (remove modify privileges for
everyone/authenticated users/power users/... accounts)


regards,

Andres Tarasco

2006/2/12, ad@...poverflow.com <ad@...poverflow.com>:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Andres Tarasco wrote:
> > Proof of concept of Sudhakar Govindavajhala and Andrew Appel paper
> > (http://www.cs.princeton.edu/~sudhakar/papers/winval.pdf) Running
> > as an unprivileged user you can test if your services are
> > vulnerable and can be used to install a backdoor. Both source code
> > and binary included *Microsoft advisory:
> > http://microsoft.com/technet/security/advisory/914457.mspx*
> >
> > *SrvCheck v2.0 is able to perform this checks remotely using for
> > example domain user credentials* *Here is a short list of Known
> > vulnerable services under XP sp2:*
> >
> > *- Advanced User: * service: DcomLaunch ( SYSTEM ) Service:
> > UpnpHost ( Local Service ) Service: SSDPSRV (Local Service) *-
> > User: * Service: UpnpHost ( Local Service ) Service: SSDPSRV (Local
> > Service) *- Network Config Operators:* service: DcomLaunch ( SYSTEM
> > ) Service: UpnpHost ( Local Service ) Service: SSDPSRV (Local
> > Service) Service: DHCP ( SYSTEM ) Service: NetBT (SYSTEM - .sys
> > driver) Service DnsCache (SYSTEM)
>
> but ms put
>
> *Is this a security vulnerability that requires Microsoft to issue a
> security update?*
> Microsoft is still investigating this issue. Customers who have
> installed Windows XP Service Pack 2 and Windows Server 2003 Service
> Pack 1 are not affected by this issue.
>
>
>
>
> ??
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>


--
Loco de aTar
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