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- #
- # This script was written by Renaud Deraison <deraison@cvs.nessus.org>
- #
- # See the Nessus Script License for details
- #
- # Script audit and contributions from Carmichael Security <http://www.carmichaelsecurity.com>
- # Erik Anderson <eanders@carmichaelsecurity.com>
- # Added BugtraqID and CVE
- #
-
-
- if(description)
- {
- script_id(10980);
- script_bugtraq_id(2604);
- script_version("$Revision: 1.4 $");
- script_cve_id("CVE-2001-0429");
-
- name["english"] = "CSCdt62732";
-
- script_name(english:name["english"]);
-
- desc["english"] = "
-
- When an 802.1x (IEEE standard for port based network access control)
- frame is received by an affected Catalyst 5000 series switch on a STP
- (Spanning Tree Protocol) blocked port it is forwarded in that VLAN
- (Virtual Local Area Network) instead of being dropped. This causes a
- performance impacting 802.1x frames network storm in that part of the
- network, which is made up of the affected Catalyst 5000 series
- switches. This network storm only subsides when the source of the
- 802.1x frames is removed or one of the workarounds in the workaround
- section is applied.
-
-
- This vulnerability is documented as Cisco bug ID CSCdt62732.
-
- Solution :
- http://www.cisco.com/warp/public/707/cat5k-8021x-vuln-pub.shtml
- Risk factor : High
-
- *** As Nessus solely relied on the banner of the remote host
- *** this might be a false positive
- ";
- script_description(english:desc["english"]);
-
- summary["english"] = "Uses SNMP to determine if a flaw is present";
- script_summary(english:summary["english"]);
-
- script_category(ACT_GATHER_INFO);
-
- script_copyright(english:"This script is (C) 2002 Renaud Deraison");
-
- script_family(english:"CISCO");
-
- script_dependencie("snmp_sysDesc.nasl",
- "snmp_cisco_type.nasl");
- script_require_keys("SNMP/community",
- "SNMP/sysDesc",
- "CISCO/model");
- exit(0);
- }
-
-
- # The code starts here
- ok=0;
- os = get_kb_item("SNMP/sysDesc"); if(!os)exit(0);
- hardware = get_kb_item("CISCO/model"); if(!hardware)exit(0);
-
-
-
-
- # Check for the required hardware...
- #----------------------------------------------------------------
- # catalyst5kRsfc
- if(ereg(string:hardware, pattern:"^catalyst5kRsfc$"))ok=1;
-
- if(!ok)exit(0);
- ok = 0;
-
-
- # Check for the required operating system...
- #----------------------------------------------------------------
- # Is this CatOS ?
- if(!egrep(pattern:".*Cisco Catalyst Operating System.*", string:os))exit(0);
- # 4.5
- if(egrep(string:os, pattern:"(4\.5\(([0-9]|1[0-1])\)|4\.5),"))ok=1;
-
- # 5.5
- if(egrep(string:os, pattern:"(5\.5\([0-6]\)|5\.5),"))ok=1;
-
- # 6.3
- if(egrep(string:os, pattern:"(6\.3\([0-2]\)|6\.3),"))ok=1;
-
-
- #----------------------------------------------
-
- if(ok)security_hole(port:161, proto:"udp");
-