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TITLE:
MIMEsweeper for SMTP Encrypted Emails Misclassification Vulnerability

SECUNIA ADVISORY ID:
SA13160

VERIFY ADVISORY:
https://secunia.com/advisories/13160/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
MIMEsweeper for SMTP 5.x
https://secunia.com/product/4235/

DESCRIPTION:
A vulnerability has been reported in MIMEsweeper for SMTP, which
potentially can be exploited by malware to bypass the scanning
functionality.

The problem is that emails containing encrypted data (e.g.
password-protected zip files) erroneously are marked as "Clean"
instead of "Encrypted".

The vulnerability only affects versions that have been upgraded
from:
* MAILsweeper Business Suite I
* MAILsweeper Business Suite II
* MAILsweeper for SMTP version 4.3

SOLUTION:
Apply hotfix:
https://www.clearswift.com/download/info.aspx?ID=552

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

ORIGINAL ADVISORY:
https://download.mimesweeper.com/www/TechnicalDocumentation/MSWSMTP505UpdateReadMe.htm

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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Definitions: (Criticality, Where etc.)
https://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
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use those supplied by the vendor.

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