TITLE:
iOpus Secure Email Attachments Password Usage Security Issue

SECUNIA ADVISORY ID:
SA19771

VERIFY ADVISORY:
http://secunia.com/advisories/19771/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
iOpus Secure Email Attachments 1.x
http://secunia.com/product/9548/

DESCRIPTION:
NtWaK0 and NoPh0BiA have reported a security issue in iOpus Secure
Email Attachments, which potentially can be exploited by malicious
people to bypass certain security restrictions.

The security issue is caused due to a design error in the way
user-supplied password is used for file encryption. If a long
password that contains a recurring sequence is used to encrypt a file
e.g. ABCDABCD, then only the first part of the sequence is required
for decryption i.e. ABCD.

The security issue has been confirmed in version 1.0. Other versions
may also be affected

SOLUTION:
Do not use passwords with recurring sequences.

PROVIDED AND/OR DISCOVERED BY:
NtWaK0 and NoPh0BiA

ORIGINAL ADVISORY:
http://www.safehack.com/Advisory/iopusemail.txt

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