[Snort-users] strange behaviour of snort 2.0.3

lpj0508 at ...2792... lpj0508 at ...2792...
Thu Nov 6 08:12:36 EST 2003


hi,

i upgraded from 2.0.2 to 2.0.3, but from the point i started up with the new version, i noticed a strange behaviour. for example, with an alert that triggered the signature "POP3 DELE overflow attempt", the payload contains a mixture of POP3 commands and HTTP statements. this looks like some kind of parsing error to me. can someone advise?

 length = 413

000 : 4E 4F 4F 50 0D 0A 54 4F 50 20 31 32 31 20 30 0D   NOOP..TOP 121 0.
010 : 0A 61 74 72 6F 6F 6D 3D 63 68 61 74 7A 6F 6E 65   .atroom=chatzone
020 : 22 3E 20 63 68 61 74 7A 6F 6E 65 20 3C 2F 6F 70   "> chatzone </op
030 : 74 69 6F 6E 3E 0D 0A 44 45 4C 45 20 31 30 35 33   tion>..DELE 1053
040 : 0D 0A 3C 6F 70 74 69 6F 6E 20 76 61 6C 75 65 3D   ..<option value=
050 : 22 63 68 61 74 72 6F 6F 6D 3D 46 75 6E 43 68 61   "chatroom=FunCha
060 : 74 22 3E 44 45 4C 45 20 31 30 35 37 0D 0A 6F 70   t">DELE 1057..op
070 : 74 69 6F 6E 3E 0D 0A 09 09 09 09 09 09 09 09 54   tion>..........T
080 : 4F 50 20 31 33 32 20 30 0D 0A 76 61 6C 75 65 3D   OP 132 0..value=
090 : 22 63 68 61 74 72 6F 6F 6D 3D 66 75 6E 66 61 63   "chatroom=funfac
0a0 : 74 6F 72 79 22 3E 20 66 75 6E 66 61 63 74 6F 72   tory"> funfactor
0b0 : 79 20 3C 2F 6F 70 74 69 6F 6E 3E 0D 0A 09 09 09   y </option>.....
0c0 : 09 09 09 09 09 09 44 45 4C 45 20 31 30 36 36 0D   ......DELE 1066.
0d0 : 0A 61 6C 75 65 3D 22 63 68 61 74 72 6F 6F 6D 3D   .alue="chatroom=
0e0 : 6B 6F 70 69 74 69 61 6D 22 3E 20 6B 6F 70 69 74   kopitiam"> kopit
0f0 : 69 61 6D 20 3C 2F 6F 70 74 69 6F 6E 3E 0D 0A 09   iam </option>...
100 : 09 09 09 09 09 09 09 09 09 09 3C 6F 70 74 69 6F   ..........<optio
110 : 6E 20 76 61 6C 75 65 3D 22 63 68 61 74 72 6F 6F   n value="chatroo
120 : 6D 3D 62 65 67 69 6E 6E 65 72 22 3E 20 62 65 67   m=beginner"> beg
130 : 69 6E 6E 65 72 20 3C 2F 6F 70 74 69 6F 6E 3E 0D   inner </option>.
140 : 0A 09 09 09 09 09 09 09 09 09 09 09 3C 6F 70 74   ............<opt
150 : 69 6F 6E 20 76 61 6C 75 65 3D 22 63 68 61 74 72   ion value="chatr
160 : 6F 6F 6D 3D 73 69 6E 67 61 70 6F 72 65 22 3E 20   oom=singapore"> 
170 : 73 69 6E 67 61 70 6F 72 65 20 3C 2F 6F 70 74 69   singapore </opti
180 : 6F 6E 3E 0D 0A 09 09 09 09 09 09 09 09 09 09 09   on>.............
190 : 3C 6F 70 74 69 6F 6E 44 45 4C 45 20 31            <optionDELE 1

pj

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