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Category:   OS (Linux)  >   Linux Kernel Vendors:
Linux Kernel dm-crypt Fails to Clear Key Storage
SecurityTracker Alert ID:  1015740
SecurityTracker URL:
CVE Reference:   CVE-2006-0095   (Links to External Site)
Date:  Mar 8 2006
Impact:   Disclosure of authentication information, Disclosure of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.6.15 and prior versions
Description:   A vulnerability was reported in dm-crypt in the Linux kernel. A local user can obtain information about cryptographic keys.

The dm-crypt component does not properly clear the crypt_config structure before freeing the structure, which may allow a local user to obtain cryptographic keys.

Impact:   A local user can obtain information about cryptographic keys.
Solution:   The vendor has issued a fixed version (2.6.16-rc1).
Vendor URL: (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  

Message History:   This archive entry has one or more follow-up message(s) listed below.
Mar 8 2006 (Red Hat Issues Fix) Linux Kernel dm-crypt Fails to Clear Key Storage   (
Red Hat has released a fix for Red Hat Enterprise Linux 4.

 Source Message Contents

Date:  Tue, 7 Mar 2006 15:50:43 -0500
Subject:  Linux kernel dm-crypt vulnerability


dm-crypt in Linux kernel 2.6.15 and earlier does not clear a structure before it is 
freed, which leads to a memory disclosure that could allow local users to obtain 
sensitive information about a cryptographic key.

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