CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
Percentile
82.0%
The remote VPN concentrator is subject to a VPN client authentication vulnerability that can force a reload of the concentrator when a very large string for the username prompt is sent.
This vulnerability is documented as Cisco bug ID CSCdx39981.
#
# (C) Tenable Network Security, Inc.
#
# Thanks to Nicolas FISCHBACH ([email protected]) for his help
#
# Ref: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20020903-vpn3k-vulnerability
include("compat.inc");
if(description)
{
script_id(11295);
script_version("1.20");
script_cve_id("CVE-2002-1095");
script_bugtraq_id(5625);
script_name(english:"Cisco VPN 3000 Concentrator PPTP No Encryption Option Remote DoS (CSCdx39981)");
script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch." );
script_set_attribute(attribute:"description", value:
"The remote VPN concentrator is subject to a VPN client
authentication vulnerability that can force a reload of the
concentrator when a very large string for the username prompt is sent.
This vulnerability is documented as Cisco bug ID CSCdx39981." );
script_set_attribute(attribute:"solution", value:
"http://www.nessus.org/u?d2dd6759" );
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"plugin_publication_date", value: "2003/03/01");
script_cvs_date("Date: 2018/06/27 18:42:25");
script_set_attribute(attribute:"vuln_publication_date", value: "2002/09/03");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value: "cpe:/o:cisco:ios");
script_end_attributes();
script_summary(english:"Uses SNMP to determine if a flaw is present");
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is (C) 2003-2018 Tenable Network Security, Inc.");
script_family(english:"CISCO");
script_dependencie("snmp_sysDesc.nasl");
script_require_keys("SNMP/community", "SNMP/sysDesc", "CISCO/model");
exit(0);
}
# The code starts here
ok=0;
os = get_kb_item("SNMP/sysDesc"); if(!os)exit(0);
# Is this a VPN3k concentrator ?
if(!egrep(pattern:".*VPN 3000 Concentrator.*", string:os))exit(0);
# 3.6.Rel
if(egrep(pattern:".*Version 3\.6\.Rel.*", string:os))ok = 1;
# < 3.5.5
if(egrep(pattern:".*Version 3\.5\.Rel.*", string:os))ok = 1;
if(egrep(pattern:".*Version 3\.5\.[0-4].*", string:os))ok = 1;
# 3.1.x
if(egrep(pattern:".*Version 3\.1\..*", string:os))ok = 1;
# 3.0.x
if(egrep(pattern:".*Version 3\.0\..*", string:os))ok = 1;
# 2.x.x
if(egrep(pattern:".*Version 2\..*", string:os))ok = 1;
if(ok)security_warning(port:161, proto:"udp");