FW-1 NG FP3 Bug - Data flow problem when transferring large files

From: Igor U.Miturin (imiturinat_private)
Date: Thu Feb 06 2003 - 03:46:51 PST

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    Hi!
    
    ***
    
    Subject:                CP FW NG FP3 fails on OPSEC CVP scanning for large files
    Affected:               Check Point FireWall-1 NG Feature Pack 3 Build 53225
    Vendor:                 Check Point
    Vendor Notified:        Yes
    
    Intro
    
    Check  Point  FireWall-1  is  enterprise  firewall solution. It supports
    OPSEC CVP specification for  interaction  with  external modules,
    like Antiviral scanners.
    
    Problem description
    
    After  Feature  Pack  3  installed Checkpoint fails to retrieve any file
    large  than  2Mb  if  CVP  is  used to check on. It makes Antiviral
    scanning unusable.
    
    Details
    
    If SMTP message longer than 2 Mb received, FW-1:
    
    1. puts message into spool
    2. send data to CVP server
    3. After sending of approx. 2Mb (or 1Mb) of data it stops
    4. After 5 minutes sending is resumed
    5. After CVP server approves data FW-1 places message in the
    spool\d_resend and loops operation until message is marked as expired.
    
    The detailed description of the problem (in Russian) you can find here:
    http://opsec.boom.ru/ru/
    (Should you have any possibility to translate the text into English,
    please, send the translation to vendor)
    
    Vendor
    
    Vendor  was contacted, but failed to reproduce problem (probably because
    eSafe Gateway was used for Antiviral scanning).
    
    ***
    
    Subject:                eSafe gateway fails to catch virii if used in CVP
    Affected:               eSafe gateway v3.5.126.0
    Vendor:                 Aladdin Knowlege Systems
    Risk:                   Average
    Vendor Notified:        No
    
    Intro
    
    eSafe gateway is a suite antiviral product. eSafe gateway can be used in
    conjunction with any firewall understanding OPSEC CVP specification.
    
    Problem description
    
    If  used to check CVP stream eSafe can only catch virus located in first
    15K  of  the  stream.  Antiviral  protection  can  easily be bypassed by
    sending infected message with 15K of clear data in the beginning.
    
    Best regards,
    Igor
    



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