DESLock+ DLMFENC.sys denial of service

deslock-dlmfencsys-dos (41204)

Medium Risk

Description:

DESLock+ is vulnerable to a denial of service, caused by an error in the DLMFENC.sys driver. By sending a specially-crafted ZERO_MEM DLMFENC_IOCTL request to the \\.\DLKPFSD_Device, a local attacker could exploit this vulnerability to cause the system to crash.

*CVSS:

Base Score:	2.1
Access Vector:	Local
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	1.6
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of DESLock+ (3.2.7 or later), available from the Data Encryption Systems Web site. See References.

References:

• Data Encryption Systems Web site: DES - Data Encryption Systems Ltd..
• CVE-2008-1138: DLMFENC.sys 1.0.0.26 in DESlock+ 3.2.6 and earlier allows local users to cause a denial of service (system crash) via a certain ZERO_MEM DLMFENC_IOCTL request to \\.\DLKPFSD_Device, aka the ring0 link list zero vulnerability.
• SA29005: DESlock+ DLMFDISK.sys/DLMFENC.sys Privilege Escalation Vulnerabilities
• VUPEN/ADV-2008-0597: DESlock+ DLMFENC and DLMFDISK Privilege Escalation Issues

Platforms Affected:

• Data Encryption Systems DESLock+ 3.2.6 and prior
• Data Encryption Systems DLMFENC.sys 1.0.0.26

Reported:

Feb 18, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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