=======
Summary
=======
Today: 31 January 2007
Reference: NGS00403
Discover: Mark Litchfield
Name: Remote Unauthenticated Code Execution II CA BrightStor ARCserve Backup 
for Laptops & Desktops r11.1
Vendor: Computer Associates
Systems Affected: BrightStor ARCserve Backup for Laptops & Desktops r11.1
Risk: Critical
Status: Published

========
TimeLine
========
Discovered: 23 June 2006
Released: 23 June 2006
Approved: 23 June 2006
Reported: 22 June 2006
Fixed: 23 January 2007
Published: 30 January 2007

===========
Description
===========
By sending a specially crafted packet to the LGSERVER.EXE process that
listens on TCP port 1900, it is possible to cause a stack overflow that
allows arbitrary code execution as Local System.

=================
Technical Details
=================
The format of the packet that's sent to LGSERVER.EXE that listens on TCP
port 1900 is as follows:

ddddddddddxxxxxxxxxxxxxxxxxxxxx

where dddddddddd is a ten-character long zero-padded decimal value
equating to the length of xxxxxxxxxxxxxxxxxxxxx (ATOI). If dddddddddd is
set to 0000032767 and xxxxxxxxxxxxxxxxxxxxx is set appropriately, a stack
buffer is overwritten, and it is possible to gain control of execution. By
default on Windows, LGSERVER.EXE (the Mobile Backup Service) runs as Local
System.

===============
Fix Information
===============
http://supportconnectw.ca.com/public/sams/lifeguard/infodocs/babldimpsec-notice.asp

NGSSoftware Insight Security Research
http://www.ngssoftware.com
http://www.databasesecurity.com/
http://www.nextgenss.com/
+44(0)208 401 0070


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