CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
Percentile
87.1%
The remote host appears to be a Cisco 12000 Series router. According to its version number, it has multiple vulnerabilities involving bypassing access control lists (ACLs). A remote attacker could use these flaws to cause a denial of service, or bypass firewall rules.
#
# (C) Tenable Network Security, Inc.
#
# CSCdm44976 - ACL will not block non initial fragments of a packet.
# CSCdu57417 - The keyword "fragment" in the compiled ACL (Turbo ACL) is ignored if a packet is destined to the router itself.
# CSCdu03323 - The implicit "deny ip any any" rule at the end of an ACL is ignored ..
# CSCdu35175 - A support for "fragment" keyword in an outgoing ACL is added.
# CSCdt96370 - An outbound Access Control List (ACL) may not block all intended traffic ..
# CSCdt69741 - Packet fragments are not filtered by the ACL despite using "fragment" keyword.
include("compat.inc");
if(description)
{
script_id(10970);
script_cve_id(
"CVE-2001-0862",
"CVE-2001-0863",
"CVE-2001-0864",
"CVE-2001-0865",
"CVE-2001-0866",
"CVE-2001-0867"
);
script_bugtraq_id(
3535,
3536,
3537,
3538,
3539,
3540
);
script_version("1.23");
script_name(english:"Cisco 12000 Series Routers Multiple Vulnerabilities (DoS, ACL Bypass)");
script_summary(english:"Uses SNMP to determine if a flaw is present");
script_set_attribute(
attribute:"synopsis",
value:"The remote router has multiple security bypass vulnerabilities."
);
script_set_attribute(
attribute:"description",
value:string(
"The remote host appears to be a Cisco 12000 Series router. According\n",
"to its version number, it has multiple vulnerabilities involving\n",
"bypassing access control lists (ACLs). A remote attacker could use\n",
"these flaws to cause a denial of service, or bypass firewall rules."
)
);
# https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20011114-gsr-acl
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?1a3f9163"
);
script_set_attribute(
attribute:"solution",
value:"Apply the fix referenced in the vendor's advisory."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/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: "2002/06/05");
script_set_attribute(attribute:"vuln_publication_date", value: "2001/11/14");
script_set_attribute(attribute:"patch_publication_date", value: "2001/11/14");
script_cvs_date("Date: 2018/11/15 20:50:20");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe",value:"cpe:/h:cisco:12000_router");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CISCO");
script_copyright(english:"This script is (C) 2002-2018 Tenable Network Security, Inc.");
script_dependencie("snmp_sysDesc.nasl",
"snmp_cisco_type.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);
hardware = get_kb_item("CISCO/model"); if(!hardware)exit(0);
# Check for the required hardware...
#----------------------------------------------------------------
# cisco12000
if(ereg(string:hardware, pattern:"^cisco12[0-9][0-9][0-9]$"))ok=1;
if(!ok)exit(0);
ok = 0;
# Check for the required operating system...
#----------------------------------------------------------------
# Is this IOS ?
if(!egrep(pattern:".*(Internetwork Operating|IOS).*", string:os))exit(0);
# 12.0S
if(egrep(string:os, pattern:"(12\.0\(([0-9]|1[0-6])\)|12\.0)S[0-9]*,"))ok=1;
# 12.0ST
if(egrep(string:os, pattern:"(12\.0\(([0-9]|1[0-8])\)|12\.0)ST[0-9]*,"))ok=1;
#----------------------------------------------
if(ok)security_hole(port:161, proto:"udp");
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0862
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0863
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0864
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0865
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0866
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0867
www.nessus.org/u?1a3f9163