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Network Security Nessus-Users
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nessus client problem

Subject: nessus client problem
Date: Thu, 29 Mar 2007 08:40:03 +0200
Hello list,

I have a problem with nessus client, when i invoke nessus with this args :

$nessus -q ip port user pass /tmp/host /tmp/host.nbe -T nbe

Result :
*** The plugins that have the ability to crash remote services or hosts


have been disabled. You should activate them if you want your security audit to be complete Segmentation fault.

More information with gdb :
*** The plugins that have the ability to crash remote services or hosts


have been disabled. You should activate them if you want your security audit to be complete

Program received signal SIGSEGV, Segmentation fault.
0x00002b70565db5b0 in strlen () from /lib/libc.so.6


(gdb) info stack #0 0x00002b70565db5b0 in strlen () from /lib/libc.so.6 #1 0x00002b70565ad4bc in vfprintf () from /lib/libc.so.6 #2 0x00002b70565cd72a in vsnprintf () from /lib/libc.so.6

#3 0x0000000000403949 in network_printf (data=0x429110 "%s <|> %s\n") at
auth.c:100 #4 0x000000000040467c in cli_send_prefs_arglist
(pref=0x21bda90, upload=0x7fff5536da88,
pprefs=<value optimized out>)

  at comm.c:604

#5 0x0000000000404941 in comm_send_preferences (preferences=<value optimized
out>) at comm.c:630 #6 0x0000000000409849 in attack_host (hostname=0x244fe60
"192.168.0.2", preferences=0x573050) at attack.c:162

#7  0x00000000004068a1 in cli_test_network (cli=0x5730b0) at cli.c:448

#8 0x0000000000424c64 in main (argc=<value optimized out>, argv=0x7fff5536dc88)
at nessus.c:1273

(gdb) select-frame 3
(gdb) list auth.c:100
95        va_start(param, data);
96
97
98        for(;;)
99        {
100        r = vsnprintf(buffer, s - 1, data, param);


101 if(r >= 0 && r < s)break; 102 s = r > s ? r + 2 : s * 2; 103 buffer = erealloc(buffer, s); 104 } (gdb) 105 len = strlen(buffer); 106 while(n < len)


107 { 108 int m = 0; 109 int size = 1024; 110 /* send by packets of 1024 bytes due to a bug in libpeks */ 111 while(m < size) 112 { 113 int e;

114        if((len - m - n) < size)size = len - m - n;

(gdb) print buffer

$2 = 0x244ff10 " <|> n_set <|>
20614;17264;22025;20935;15212;16206;24162;21608;20308;21825;24145;17062;15077;22330;16735;19787;23551;18613;20572;18302;11511;11500;21207;14761;19806;20728;17022;17593;23540;20525;13584"...



I am using kernel 2.6.18-2-amd64 GNU/Linux and nessus ( source
download of homepage official and compiled ) 2.2.9 and libc6
2.3.6.ds1-11 (debian etch)

We have two machines with amd64 and debian etch, the problem is in
both machines.

Thanks people.
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