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Category:   Application (Generic)  >   Centennial Discovery Vendors:   Centennial Software
Centennial Discovery Stack Overflow in 'XferWan.exe' Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1018191
SecurityTracker URL:  http://securitytracker.com/id/1018191
CVE Reference:   CVE-2007-2514   (Links to External Site)
Date:  Jun 5 2007
Impact:   Execution of arbitrary code via network, Root access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 6.5
Description:   A vulnerability was reported in Centennial Discovery. A remote user can execute arbitrary code on the target system.

A remote user can send a request with a specially crafted 'Filename' parameter to trigger a stack overflow in the XferWAN process and execute arbitrary code on the target system. The code will run with System privileges.

Only systems running non-secure communications are affected.

The vendor was notified on March 7, 2007.

Cody Pierce of TippingPoint DVLabs discovered this vulnerability.

The original advisory is available at:

http://dvlabs.tippingpoint.com/advisory/TPTI-07-10

Impact:   A remote user can execute arbitrary code on the target system with System level privileges.
Solution:   The vendor has reportedly issued a fix.
Vendor URL:  www.centennial-software.com/products/discovery/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  [Full-disclosure] TPTI-07-10: Centennial Software XferWan.exe Stack

TPTI-07-10: Centennial Software XferWan.exe Stack Overflow Vulnerability
http://dvlabs.tippingpoint.com/advisory/TPTI-07-10
June  4, 2007

-- CVE ID:
CVE-2007-2514

-- Affected Vendor:
Centennial Software

-- Affected Products:
Symantec Discovery 6.5

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since April  3, 2007 by Digital Vaccine protection
filter ID 5231. For further product information on the TippingPoint IPS:

    http://www.tippingpoint.com 

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of software utilizing Centennial Software
XferWan. Authentication is not required to exploit this vulnerability.

The specific flaw exists during the parsing of overly long requests to
the XferWAN process. When logging requests, user-supplied data is
copied to the stack resulting in an exploitable buffer overflow
condition. The following disassembly excerpt from the logging function
demonstrates the issue:

    004047A0 mov cl, Filename[eax]
    004047A6 mov [esp+eax+890h+ExistingFileName], cl
    004047AD inc eax
    004047AE test cl, cl
    004047B0 jnz short loc_4047A0

A lack of sanity checking on the size of 'Filename' results in an
exploitable stack-based  buffer overflow vulnerability that can result
in a system compromise running under the context of the SYSTEM user.

-- Vendor Response:
Centennial has rectified an issue in the XFERWAN omponent of Centennial
Discovery which could be remotely exploited by malicious people to
compromise a system.

This issue only affects systems running non-secure communications,
which comprise a very small percentage of installations worldwide. 
Customers can find instructions on how to identify if they are
susceptible to the vulnerability and correct, if necessary on the
Centennial Customer Support website.

-- Disclosure Timeline:
2007.03.07 - Vulnerability reported to vendor
2007.04.03 - Digital Vaccine released to TippingPoint customers
2007.06.04 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by Cody Pierce, TippingPoint DVLabs


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