Re: Snort Abend after BAD-TRAFFIC

[Mark.Schutzmann () Omron com]

Jason,

Thanks for your insight. It makes sense that if I am getting slammed with
something that the file structure would grow enormously. As a matter of
fact, I was unable to do an rm -rf /var/log/snort/* as it was giving me an
error. Coincidentally, I have been seeing a ton of this type of traffic
from my Cisco PIX firewall:

106016: Deny IP spoof from (127.0.0.1) to 209.176.173.238 on interface
inside
106016: Deny IP spoof from (127.0.0.1) to 209.176.238.238 on interface
inside
106016: Deny IP spoof from (127.0.0.1) to 209.176.49.110 on interface
inside

...and also a ton of this from Snort:

Mar 21 13:56:09 OEI-RHLXSnort snort: [1:528:4] BAD-TRAFFIC loopback traffic
[Classification: Potentially Bad Traffic] [Priority: 2]: {TCP} 127.0.0.1:80
-> 209.176.3.124:1577
Mar 21 13:56:09 OEI-RHLXSnort snort: [1:528:4] BAD-TRAFFIC loopback traffic
[Classification: Potentially Bad Traffic] [Priority: 2]: {TCP} 127.0.0.1:80
-> 209.176.16.250:1260
Mar 21 13:56:09 OEI-RHLXSnort snort: [1:528:4] BAD-TRAFFIC loopback traffic
[Classification: Potentially Bad Traffic] [Priority: 2]: {TCP} 127.0.0.1:80
-> 209.176.16.250:1260
Mar 21 13:56:09 OEI-RHLXSnort snort: [1:528:4] BAD-TRAFFIC loopback traffic
[Classification: Potentially Bad Traffic] [Priority: 2]: {TCP} 127.0.0.1:80
-> 209.176.81.250:1095


Any ideas about whether this is a security breach or new worm? I have never
seen this prior to today.

Thanks,
Mark


                                                                                                                        
                          
                      Jason <security () brvenik com>                                                                   
                             
                      Sent by:                            To:       Mark.Schutzmann () Omron com                        
                             
                      snort-users-admin () lists sour        cc:       snort-users () lists sourceforge net             
                                
                      ceforge.net                         Subject:  Re: [Snort-users] Snort Abend after BAD-TRAFFIC     
                          
                                                                                                                        
                          
                                                                                                                        
                          
                      03/21/2004 10:56 AM                                                                               
                          
                                                                                                                        
                          
                                                                                                                        
                          




I believe your problem will be resolved by moving to a different logging
format.

the message

Mar 21 10:28:37 OEI-RHLXSnort snort: FATAL ERROR: OpenLogFile() =>
mkdir(/var/log/snort/209.176.247.84) log directory: Too many link
s

indicates you have too many files under the current directory.


Mark.Schutzmann () Omron com wrote:

> I saw these messages in my syslog this morning after an alert that Snort
> had abended. There were more than 100 of the BAD-TRAFFIC messages though.
> Does anyone have any suggestions about whether there is some
configuration
> in my snort.conf or other external factors that could have caused this?
>
> Best Regards,
> Mark
>
>
> Mar 21 10:28:37 OEI-RHLXSnort snort: [1:528:4] BAD-TRAFFIC loopback
traffic
> [Classification: Potentially Bad Traffic] [Priority: 2]:
>  {TCP} 127.0.0.1:80 -> 209.176.102.178:1043
> Mar 21 10:28:37 OEI-RHLXSnort snort: [1:528:4] BAD-TRAFFIC loopback
traffic
> [Classification: Potentially Bad Traffic] [Priority: 2]:
>  {TCP} 127.0.0.1:80 -> 209.176.6.213:1713
> Mar 21 10:28:37 OEI-RHLXSnort snort: [1:528:4] BAD-TRAFFIC loopback
traffic
> [Classification: Potentially Bad Traffic] [Priority: 2]:
>  {TCP} 127.0.0.1:80 -> 209.176.6.213:1713
> Mar 21 10:28:37 OEI-RHLXSnort snort: [1:528:4] BAD-TRAFFIC loopback
traffic
> [Classification: Potentially Bad Traffic] [Priority: 2]:
>  {TCP} 127.0.0.1:80 -> 209.176.247.84:1704
> Mar 21 10:28:37 OEI-RHLXSnort snort: FATAL ERROR: OpenLogFile() =>
> mkdir(/var/log/snort/209.176.247.84) log directory: Too many link
> s
> Mar 21 10:28:37 OEI-RHLXSnort kernel: device eth0 left promiscuous mode
>
>
>
>
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Free Linux tutorial presented by Daniel Robbins, President and CEO of
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