TITLE:
NeoMail neomail-prefs.pl Missing Session ID Validation

SECUNIA ADVISORY ID:
SA18785

VERIFY ADVISORY:
http://secunia.com/advisories/18785/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
NeoMail 1.x
http://secunia.com/product/8022/

DESCRIPTION:
Secunia Research has discovered a vulnerability in NeoMail, which can
be exploited by malicious people to bypass certain security
restrictions.

The vulnerability is caused due to missing validation of the Session
ID in the "addfolder()" and "deletefolder()" functions in
neomail-prefs.pl. This can be exploited to create mail-folder files
in arbitrary directories writable by the mail group (e.g. in users'
"/var/neomail/users" NeoMail directories), and to delete mail-folder
files created by arbitrary users if the names of the folder files are
known.

Successful exploitation requires that NeoMail is configured with
$homedirfolders = 'no' and $homedirspools = 'no'.

The vulnerability has been confirmed in version 1.28. Prior versions
may also be affected.

SOLUTION:
Update to version 1.29.
http://sourceforge.net/project/showfiles.php?group_id=2874

PROVIDED AND/OR DISCOVERED BY:
Tan Chew Keong, Secunia Research.

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2006-3/advisory/

NeoMail:
http://sourceforge.net/project/shownotes.php?release_id=392562&group_id=2874

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About:
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