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If you have found a vulnerability, please send to our SecurityAlert Database : secalert()securityreason()com
Also if you have new ( 0-day ) exploit, please send to our ExploitAlert Archive :
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Home SecurityAlert Database |
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Topic : | Local privilege Escalation in SmartLine DeviceLock 5.73
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SecurityAlert : 1392
CVE : CVE-2006-4184
SecurityRisk : Medium (About)
Remote Exploit : No
Local Exploit : Yes
Exploit Available : No
Credit : seppi seppig de
Published : 18.08.2006
Affected Software : | SmartLine DeviceLock 5.73 |
 Advisory Content : The vulnerability constitutes of wrong ACLs on Device Object permission set
by the driver.
Whenever your ACLs on a harddrive or partition, as configured by DeviceLock
Manager, only consists of Allow entries (and Deny being the default), then
the driver sets the ACLs on the kernel's internal object
DeviceHarddiskXPartitionY to Everyone:FullAccess, which allows complete
read and write access to the raw file system, circumventing all access
restrictions of NTFS. This behaviour can be easily verified by using
Sysinternals' WinObj and dd.exe (dd if=\.C: | grep 'somesecretstuff') from
GunWin32 or Win32-BinUtils (Cygwin should do the job as well) with a
restricted user account.
In contrast, at least one explicit Deny entry leads to applying
Everyone:DenyFullAccess, which effectively locks out even administrator
users and the system, leading to certain problems with the Logical Volume
Manager and some other system management utilities.
The vendor SmartLine has been informed about this vulnerability some weeks
ago and verified it. However, they don't intend to release any patch, but
rather refered to the upcoming version 6 of their software.
Workaround:
I didn't bother to check other objects for misplaced ACLs as well, but
creating at least one explicit deny entry (as discussed above) should at
least fix the vulnerability. It might also be possible to write a program
that readjusts the ACLs on every reboot. Better uninstall this software at
once.
Feedback :
If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com.
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