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Category:   Application (Generic)  >   f2c Vendors:   Gay, David M. et al
fc/f2c Unsafe Temporary Files May Let Local Users Obtain Elevated Privileges
SecurityTracker Alert ID:  1013028
SecurityTracker URL:  http://securitytracker.com/id/1013028
CVE Reference:   CVE-2005-0017, CVE-2005-0018   (Links to External Site)
Date:  Jan 28 2005
Impact:   Modification of system information, Modification of user information, User access via local system

Version(s): 20010821
Description:   Some vulnerabilities were reported in fc and f2c. A local user can obtain elevated privileges.

Debian reported that fc and f2c use temporary files in an unsafe manner. A local user can create a symbolic link (symlink) from a critical file on the system to a temporary file to be used by fc/f2c. Then, when the application is run by a target user, the symlinked file may be overwritten with the privileges of the target user.

Javier Fernandez-Sanguino Pena from the Debian Security Audit project is credited with discovering these flaws.

Impact:   A local user may be able to obtain elevated privileges of a target user when the target user runs fc or f2c.
Solution:   No solution was available at the time of this entry.
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.
Jan 28 2005 (Debian Issues Fix) fc/f2c Unsafe Temporary Files May Let Local Users Obtain Elevated Privileges
Debian has released a fix.
Jan 31 2005 (Gentoo Issues Fix) fc/f2c Unsafe Temporary Files May Let Local Users Obtain Elevated Privileges
Gentoo has released a fix.



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