[Snort-sigs] SID 8440: IMAP SSLv2 openssl get shared ciphers overflow attempt
pauls at ...1311...
Thu Nov 9 18:21:01 EST 2006
I already sent a pcap to development. Do you need another one?
--On Thursday, November 09, 2006 12:49:56 -0500 Brian <bmc at ...95...> wrote:
> On Tue, Nov 07, 2006 at 02:22:14PM -0600, Paul Schmehl wrote:
>> I'm getting a boatload of alerts from one host for this SID. The rule
>> looks for [01 03] (SOH followed by ETX) at a depth of 2 bytes. Every
>> single packet that triggers this alert begins with this sequence: 17 03
>> 01 03 80
>> ETB ETX SOH ETX followed by a high ascii character. So, End of
>> Transmission Block, End of Text, Start of Heading, End of Text, high
>> Any of you uber-geeks want to translate what this host is doing? Or
>> attempting to do? (BTW, I suspect this is "benign" activity. The
>> source host is on a local ISP's network, and the dest host is our imap
>> server. The alerts are triggered every two minutes, give or take a
>> hundredth of a second, so it looks like aggressive mail checking.)
>> Is this a broken client? Eeeevvviiilll?
> IIRC, I wrote those rules. Send me pcap. I'll take a look.
Paul Schmehl (pauls at ...1311...)
Senior Information Security Analyst
The University of Texas at Dallas
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