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Re: MS SQL WORM IS DESTROYING INTERNET BLOCK PORT 1434!
Von:
H D Moore <sflist@digitaloffense.net>
An:
bugtraq@securityfocus.com
Datum:
Sat, 25 Jan 2003 05:49:09 -0600
A worm which exploits a (new?) vulnerability in SQL Server is bringing
the core routers to a grinding halt. The speed of the propagation can be
attributed to the attack method and simplicity of the code. The worm
sends a 376-byte UDP packet to port 1434 of each random target, each
vulnerable system will immediately start propagating itself. Since UDP
is connection-less, the worm is able to spread much more quickly than
those using your standard TCP-based attack vectors (no connect
timeouts).
Some random screen shots, a copy of the worm as a perl script, and a
disassembly (sorry, no comments) can be found online at:
http://www.digitaloffense.net/worms/mssql_udp_worm/
-HD
On Saturday 25 January 2003 01:11, Michael Bacarella wrote:
> I'm getting massive packet loss to various points on the globe.
> I am seeing a lot of these in my tcpdump output on each
> host.
>
> 02:06:31.017088 150.140.142.17.3047 > 24.193.37.212.ms-sql-m: udp 376
> 02:06:31.017244 24.193.37.212 > 150.140.142.17: icmp: 24.193.37.212 udp
> port ms-sql-m unreachable [tos 0xc0
>
> It looks like there's a worm affecting MS SQL Server which is
> pingflooding addresses at some random sequence.
>
> All admins with access to routers should block port 1434 (ms-sql-m)!
>
> Everyone running MS SQL Server shut it the hell down or make
> sure it can't access the internet proper!
>
> I make no guarantees that this information is correct, test it
> out for yourself!
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