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Category:   Application (Generic)  >   Usermin Vendors:   Cameron, Jamie
Usermin '' Unsafe Temporary Directory Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1011267
SecurityTracker URL:
CVE Reference:   CAN-2004-0559   (Links to External Site)
Date:  Sep 14 2004
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): prior to 1.089
Description:   A vulnerability was reported in Usermin in the '' script. A local user may be able to gain elevated privileges.

The vendor reported that the script creates the '/tmp/.usermin' directory in an unsafe manner during installation. A local user can create a symbolic link (symlink) from a critical file on the system to the temporary directory name. Then, when Usermin is installed, the symlinked file will be overwritten.

According to Debian, Ludwig Nussel discovered this flaw.

Impact:   A local user can obtain elevated (root) privileges on the target system.
Solution:   The vendor has released a fixed version (1.090), available at:

Vendor URL: (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Sep 14 2004 (Gentoo Issues Fix) Usermin '' Unsafe Temporary Directory Lets Local Users Gain Elevated Privileges
Gentoo has released a fix.

 Source Message Contents

[Original Message Not Available for Viewing]

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