code | #
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(10009);
script_version("1.50");
script_cvs_date("Date: 2018/06/29 12:00:59");
script_cve_id("CVE-1999-0789");
script_bugtraq_id(679);
script_name(english:"AIX FTPd libc Library Remote Buffer Overflow");
script_summary(english:"Checks for a buffer overflow in the remote FTPd");
script_set_attribute(attribute:"synopsis", value:"The remote host is affected by a remote buffer overflow vulnerability.");
script_set_attribute(attribute:"description", value:
"It was possible to crash the remote FTP server by issuing the command :
CEL aaaa[...]aaaa
This problem is known as the 'AIX FTPd' overflow and may allow the
remote user to easily gain access to the root (super-user) account on
the remote system.");
script_set_attribute(attribute:"see_also", value:"http://archives.neohapsis.com/archives/bugtraq/1999-q3/1089.html");
script_set_attribute(attribute:"solution", value:
"If you are using AIX FTPd, then read IBM's advisory number
ERS-SVA-E01-1999:004.1, or contact your vendor for a patch.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"1999/09/28");
script_set_attribute(attribute:"plugin_publication_date", value:"1999/09/30");
script_set_attribute(attribute:"potential_vulnerability", value:"true");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_end_attributes();
script_category(ACT_MIXED_ATTACK); # mixed
script_family(english:"FTP");
script_copyright(english:"This script is Copyright (C) 1999-2018 Tenable Network Security, Inc.");
script_dependencie("find_service1.nasl", "ftpserver_detect_type_nd_version.nasl");
script_require_keys("Settings/ParanoidReport");
script_require_ports("Services/ftp", 21);
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("ftp_func.inc");
if (report_paranoia < 2) audit(AUDIT_PARANOID);
port = get_ftp_port(default: 21);
if (get_kb_item("ftp/"+port+"/msftpd") || get_kb_item("ftp/"+port+"/vxftpd"))
exit(0);
banner = get_ftp_banner(port: port);
if ( ! banner ) exit(1, "No FTP banner on port "+port+".");
if ( ! egrep(pattern:".*FTP server .Version 4\.", string:banner) ) exit(0);
if(safe_checks())
{
if(egrep(pattern:".*FTP server .Version 4\.3.*",
string:banner)){
security_hole(port:port, extra:
"Nessus reports this vulnerability using only information
that was gathered. Use caution when testing without safe checks
enabled." );
}
exit(0);
}
get_kb_item_or_exit("ftp/"+port+"/vxworks");
soc = open_sock_tcp(port);
if (!soc) exit(1, "Cannot connect to TCP port "+port+".");
buf = ftp_recv_line(socket:soc);
if(!buf){
close(soc);
exit(0);
}
buf = 'CEL a\r\n';
send(socket:soc, data:buf);
r = ftp_recv_line(socket:soc);
if(!r)exit(0);
buf = strcat('CEL ', crap(2048), '\r\n');
send(socket:soc, data:buf);
b = ftp_recv_line(socket:soc);
if(!b)security_hole();
ftp_close(socket: soc);
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