TITLE:
MigrationTools Insecure Temporary File Usage Vulnerability

SECUNIA ADVISORY ID:
SA17530

VERIFY ADVISORY:
http://secunia.com/advisories/17530/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information

WHERE:
Local system

SOFTWARE:
MigrationTools
http://secunia.com/product/6114/

DESCRIPTION:
Jason Hoover has discovered a vulnerability in MigrationTools, which
can be exploited by malicious, local users to disclose potentially
sensitive information or to perform certain actions on a vulnerable
system with escalated privileges.

The vulnerability is caused due to the "nis.$$.ldif" temporary files
being created insecurely in "/tmp". This can be exploited via symlink
attacks to overwrite arbitrary files with the privileges of the user
running the "migrate_all_online.sh" script.  The temporary files are
world-readable are not deleted if "ldapadd" fails. This may disclose
sensitive information such as users' password hashes.

The vulnerability has been confirmed in version 46. Other versions
may also be affected.

SOLUTION:
Grant only trusted users access to affected systems.

PROVIDED AND/OR DISCOVERED BY:
Jason Hoover

ORIGINAL ADVISORY:
Debian:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=338920

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